Factory Direct Precision Control Dual Compressor Air Cooled Screw Compressor Type Water Chiller Ambient Cooling System HVAC Unit Industrial Air Cooled Chillers

Product Description

Product Description

Dual-Compressor Air-Cooled Screw Chiller (7~25°C)
 

Item Name / Model			DEL-DAS
			177	241	316	344	419	460	542	573	627	678
Cooling Capacity	kW		176.6	240.6	315.8	343.8	419.2	460.2	542.2	572.8	626.8	678.4
	10³kcal/h		151.8	206.8	271.6	295.6	360.4	395.6	466.2	492.6	539.2	583.4
	Ton (USRT)		50	68	90	98	120	130	154	162	178	192
Operation Control Mode			PLC programmable controller / Microcomputer controller
Main Power Supply Voltage			3φ/380V±5%/50HZ
Compressor	Type		Asymmetric semi hermetic screw compressor
	Motor		3-phase 2-pole squirrel cage induction motor
	Rotation		2950r/min/50Hz
	Insulation class		F
	Quantity		2 Sets
	Startup type		Y-△
	Energy regulation		0-16.5-33-50-66-83.5-100%			0-12.5-25-37.5-50-62.5-75-87.5-100%
	Power	kW	46.6	61.4	77.2	84.4	102.8	112.2	126.2	132.6	146.2	159.2
	Current	A	78.4	103.2	129.4	142.2	172.8	188.2	211.8	222.8	245.4	267.6
Evaporator	Type		Shell and Tube Dry Evaporator
	Flow rate	m³/h	30	42	54	60	72	80	94	100	108	116
	Pipe diameter		DN80		DN100				DN125
Condenser	Type		Finned type with hydrophilic aluminum fins and high-efficiency inner grooved copper tubes
	Air volume	m³/h	68400	91200	117800	125400	159600	171000	201400	212800	231800	250800
	Power	kW	3.6	5.4	7.2	8.8	13.2	13.2	13.2	15.6	15.6	17.6
Refrigerant			R23/R404/R407C/R410A/R134a (Customized)
Control Mode			Thermostatic expansion valve / Electronic expansion valve
Overall Dimension	Length	mm	3800	3800	4200	4400	4600	5600	5600	5600	6900	8000
	Width	mm	2000	2000	2200	2200	2200	2200	2200	2200	2200	2200
	Height	mm	2300	2300	2300	2300	2500	2500	2500	2500	2500	2500
Noise		DB	73.1	3200	3350	3850	4400	4800	4950	5150	5450	5750
Net Weight		kg	3200	3350	3850	4400	4800	4950	5150	5450	5750	5900

Remark:
1. The refrigeration capacity stated above represents the nominal cooling output.
2. Chilled water inlet temperature: 12°C; outlet temperature: 7°C. Ambient temperature: 35°C.
3. Unit safe operating range: Chilled water inlet temperature 5°C to 15°C. 
4. Power supply configuration: 3P-380V-50Hz. Three-phase four-wire system recommended. Voltage fluctuation tolerance: ±5%; frequency fluctuation tolerance: ±2%.
5. Due to ongoing technological advancements, prior notice cannot be given for any modifications to the above parameters.
Note: The specifications above represent factory standard configurations. Customization is available for special requirements.


Dual-Compressor Air-Cooled Screw Chiller (-5°C)  
 

Item Name / Model			DEL-DAS2
			111	152	199	217	265	290	342	362	396	428
Cooling Capacity	kW		111.4	152	199.4	217	264.6	290.4	342.2	361.6	395.6	428.2
	10³kcal/h		95.8	130.8	171.4	186.6	227.4	249.8	294.2	311	340.2	368.2
	Ton (USRT)		32	44	56	62	76	82	98	102	112	122
Operation Control Mode			PLC programmable controller / Microcomputer controller
Main Power Supply Voltage			3φ/380V±5%/50HZ
Compressor	Type		Asymmetric semi hermetic screw compressor
	Motor		3-phase 2-pole squirrel cage induction motor
	Rotation		2950r/min/50Hz
	Insulation class		F
	Quantity		2 Sets
	Startup type		Y-△
	Energy regulation		0-16.5-33-50-66-83.5-100%			0-12.5-25-37.5-50-62.5-75-87.5-100%
	Power	kW	42.2	55.4	69.4	76.2	92.6	100.8	113.6	118.2	131.6	143.6
	Current	A	70.6	93.2	116.6	128.2	155.8	169.6	191.2	200.8	221.2	241.2
Evaporator	Type		Shell and Tube Dry Evaporator
	Flow rate	m³/h	20	26	34	38	46	50	58	62	68	74
	Pipe diameter		DN80		DN100				DN125
Condenser	Type		Finned type with hydrophilic aluminum fins and high-efficiency inner grooved copper tubes
	Air volume	m³/h	68400	91200	117800	125400	159600	171000	201400	212800	231800	250800
	Power	kW	3.6	5.4	7.2	8.8	13.2	13.2	13.2	15.6	15.6	17.6
Refrigerant			R23/R404/R407C/R410A/R134a (Customized)
Control Mode			Thermostatic expansion valve / Electronic expansion valve
Overall Dimension	Length	mm	3800	3800	4200	4400	4600	5600	5600	5600	6900	8000
	Width	mm	2000	2000	2200	2200	2200	2200	2200	2200	2200	2200
	Height	mm	2300	2300	2300	2300	2500	2500	2500	2500	2500	2500
Noise		DB	73.1	73.7	74.8	78.4	79	79.2	79.6	79.9	80.4	81.5
Net Weight		kg	1850	3200	3350	3850	4400	4800	4950	5150	5450	5750

Remark:
1. The refrigeration capacity stated above represents the nominal cooling output.
2. Chilled water inlet temperature: 0°C; outlet temperature: -5°C. Ambient temperature: 35°C.
3. Unit safe operating range: Chilled water inlet temperature -7°C to 3°C. Chilled water must be supplemented with antifreeze; a 25% (V/V) ethylene glycol solution is recommended.
4. Power supply configuration: 3P-380V-50Hz. Three-phase four-wire system recommended. Voltage fluctuation tolerance: ±5%; frequency fluctuation tolerance: ±2%.
5. Due to ongoing technological advancements, prior notice cannot be given for any modifications to the above parameters.
Note: The specifications above represent factory standard configurations. Customization is available for special requirements.


Dual-Compressor Air-Cooled Screw Chiller (-10°C)  
 

Item Name / Model			DEL-DAS3
			444	529	558	611	662	687	800	879	939	1058
Cooling Capacity	kW		444.2	528.6	558.2	611.2	661.8	687.2	800.4	879.2	938.6	1057.8
	10³kcal/h		382.2	454.6	480.2	525.6	569.2	591.2	688.4	755.8	807.2	909.6
	Ton (USRT)		126	150	158	174	188	196	227.6	250	266	300
Operation Control Mode			PLC programmable controller / Microcomputer controller
Main Power Supply Voltage			3φ/380V±5%/50HZ
Compressor	Type		Asymmetric semi hermetic screw compressor
	Motor		3-phase 2-pole squirrel cage induction motor
	Rotation		2950r/min/50Hz
	Insulation class		F
	Quantity		2 Sets
	Startup type		Y-△
	Energy regulation		0-12.5-25-37.5-50-62.5-75-87.5-100%
	Power	kW	152.8	177.4	187.4	203.2	218.6	225.6	259.8	288.2	306.2	344.2
	Current	A	261.2	303.2	320.2	346.6	373.2	385.2	443.6	492.2	522.6	587.2
Evaporator	Type		Shell and Tube Dry Evaporator
	Flow rate	m³/h	64	76	80	86	94	98	114	126	134	150
	Pipe diameter		DN125		DN150				DN200
Condenser	Type		Finned type with hydrophilic aluminum fins and high-efficiency inner grooved copper tubes
	Air volume	m³/h	276400	319200	342000	372400	402800	418000	482600	528200	562400	627000
	Power	kW	17.6	20.8	20.8	24	30	36	36	36	36	36
Refrigerant			R23/R404/R407C/R410A/R134a (Customized)
Control Mode			Thermostatic expansion valve / Electronic expansion valve
Overall Dimension	Length	mm	8000	9000	9500	10200	11000	11000	11800	13200	13200	13200
	Width	mm	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200
	Height	mm	2500	2500	2500	2500	2500	2500	2500	2500	2500	2500
Noise		DB	73	73.7	74.8	78.4	79	79.2	79.6	80.4	80.4	83.1
Net Weight		kg	1850	6500	7400	7800	8750	9200	9500	9800	10500	11500

Remark:
1. The refrigeration capacity stated above represents the nominal cooling output.
2. Chilled water inlet temperature: -5°C; outlet temperature: -10°C. Ambient temperature: 35°C.
3. Unit safe operating range: Chilled water inlet temperature -13°C to -3°C. Chilled water must be supplemented with antifreeze; a 30% (V/V) ethylene glycol solution is recommended.
4. Power supply configuration: 3P-380V-50Hz. Three-phase four-wire system recommended. Voltage fluctuation tolerance: ±5%; frequency fluctuation tolerance: ±2%.
5. Due to ongoing technological advancements, prior notice cannot be given for any modifications to the above parameters.
Note: The specifications above represent factory standard configurations. Customization is available for special requirements.



Dual-Compressor Air-Cooled Screw Chiller (-15°C)  
 

Item Name / Model			DEL-DAS4
			87	118	155	169	206	226	266	281	308	333
Cooling Capacity	kW		86.6	118.2	155.2	168.8	205.8	225.8	266.2	281.2	307.6	333.2
	10³kcal/h		74.4	101.6	133.4	145.2	177.2	194.2	229.2	241.8	264.6	286.4
	Ton (USRT)		28	34	44	48	58	64	76	80	88	94
Operation Control Mode			PLC programmable controller / Microcomputer controller
Main Power Supply Voltage			3φ/380V±5%/50HZ
Compressor	Type		Asymmetric semi hermetic screw compressor
	Motor		3-phase 2-pole squirrel cage induction motor
	Rotation		2950r/min/50Hz
	Insulation class		F
	Quantity		2 Sets
	Startup type		Y-△
	Energy regulation		0-16.5-33-50-66-83.5-100%			0-12.5-25-37.5-50-62.5-75-87.5-100%
	Power	kW	43.2	56.6	71.2	77.8	94.6	103.2	116.2	122.2	134.4	146.8
	Current	A	73.4	96.6	121.2	132.8	161.6	176.2	198.4	208.6	229.6	250.4
Evaporator	Type		Shell and Tube Dry Evaporator
	Flow rate	m³/h	14	20	26	30	36	38	46	48	52	58
	Pipe diameter		DN80		DN100				DN125
Condenser	Type		Finned type with hydrophilic aluminum fins and high-efficiency inner grooved copper tubes
	Air volume	m³/h	68400	91200	117800	125400	159600	171000	201400	212800	231800	250800
	Power	kW	3.6	5.4	7.2	8.8	13.2	13.2	13.2	15.6	15.6	17.6
Refrigerant			R23/R404/R407C/R410A/R134a (Customized)
Control Mode			Thermostatic expansion valve / Electronic expansion valve
Overall Dimension	Length	mm	3800	3800	4200	4400	4600	5600	5600	5600	6900	8000
	Width	mm	2000	2000	2200	2200	2200	2200	2200	2200	2200	2200
	Height	mm	2300	2300	2300	2300	2500	2500	2500	2500	2500	2500
Noise		DB	73.1	73.7	74.8	78.4	79	79.2	79.6	79.9	80.4	81.5
Net Weight		kg	1850	3200	3350	3850	4400	4800	4950	5150	5450	5750

Remark:
1. The refrigeration capacity stated above represents the nominal cooling output.
2. Chilled water inlet temperature: -10°C; outlet temperature: -15°C. Ambient temperature: 35°C.
3. Unit safe operating range: Chilled water inlet temperature -18°C to -8°C. Chilled water must be supplemented with antifreeze; a 35% (V/V) ethylene glycol solution is recommended.
4. Power supply configuration: 3P-380V-50Hz. Three-phase four-wire system recommended. Voltage fluctuation tolerance: ±5%; frequency fluctuation tolerance: ±2%.
5. Due to ongoing technological advancements, prior notice cannot be given for any modifications to the above parameters.
Note: The specifications above represent factory standard configurations. Customization is available for special requirements. 



Dual-Compressor Air-Cooled Screw Chiller (-20°C)  
 

Item Name / Model			DEL-DAS5
			71	97	127	138	168	185	217	230	251	272
Cooling Capacity	kW		70.8	96.6	126.6	138.2	168.2	184.6	217.4	229.8	251.4	272.2
	10³kcal/h		60.8	83	108.8	118.6	144.6	158.8	187	197.6	216.2	234.2
	Ton (USRT)		20	28	36	40	48	52	63	66	72	78
Operation Control Mode			PLC programmable controller / Microcomputer controller
Main Power Supply Voltage			3φ/380V±5%/50HZ
Compressor	Type		Asymmetric semi hermetic screw compressor
	Motor		3-phase 2-pole squirrel cage induction motor
	Rotation		2950r/min/50Hz
	Insulation class		F
	Quantity		2 Sets
	Startup type		Y-△
	Energy regulation		0-16.5-33-50-66-83.5-100%			0-12.5-25-37.5-50-62.5-75-87.5-100%
	Power	kW	41.6	54.8	68.8	75.4	91.8	100.2	112.6	118.6	130.4	142.4
	Current	A	71.2	93.6	117.4	128.8	156.8	170.8	192.4	202.4	222.8	243.2
Evaporator	Type		Shell and Tube Dry Evaporator
	Flow rate	m³/h	12	16	22	24	28	32	38	40	44	48
	Pipe diameter		DN80		DN100				DN125
Condenser	Type		Finned type with hydrophilic aluminum fins and high-efficiency inner grooved copper tubes
	Air volume	m³/h	68400	91200	117800	125400	159600	171000	201400	212800	231800	250800
	Power	kW	3.6	5.4	7.2	8.8	13.2	13.2	13.2	15.6	15.6	17.6
Refrigerant			R23/R404/R407C/R410A/R134a (Customized)
Control Mode			Thermostatic expansion valve / Electronic expansion valve
Overall Dimension	Length	mm	3800	3800	4200	4400	4600	5600	5600	5600	6900	8000
	Width	mm	2000	2000	2200	2200	2200	2200	2200	2200	2200	2200
	Height	mm	2300	2300	2300	2300	2500	2500	2500	2500	2500	2500
Noise		DB	73.1	73.7	74.8	78.4	79	79.2	79.6	79.9	80.4	81.5
Net Weight		kg	1850	3200	3350	3850	4400	4800	4950	5150	5450	5750

Remark:
1. The refrigeration capacity stated above represents the nominal cooling output.
2. Chilled water inlet temperature: -15°C; outlet temperature: -20°C. Ambient temperature: 35°C.
3. Unit safe operating range: Chilled water inlet temperature -23°C to -13°C. Chilled water must be supplemented with antifreeze; a 40% (V/V) ethylene glycol solution is recommended.
4. Power supply configuration: 3P-380V-50Hz. Three-phase four-wire system recommended. Voltage fluctuation tolerance: ±5%; frequency fluctuation tolerance: ±2%.
5. Due to ongoing technological advancements, prior notice cannot be given for any modifications to the above parameters.
Note: The specifications above represent factory standard configurations. Customization is available for special requirements. 



Dual-Compressor Air-Cooled Screw Chiller (-25°C)  
 

Item Name / Model			DEL-DAS6
			242	288	304	333	361	375	436	479	512	577
Cooling Capacity	kW		242.2	288.2	304.2	333.2	360.8	374.6	436.2	479.2	511.6	576.6
	10³kcal/h		208.2	247.8	261.6	286.6	310.2	322.2	375.2	412.2	439.8	495.8
	Ton (USRT)		68	82	86	94	102	106	124	136	146	164
Operation Control Mode			PLC programmable controller / Microcomputer controller
Main Power Supply Voltage			3φ/380V±5%/50HZ
Compressor	Type		Asymmetric semi hermetic screw compressor
	Motor		3-phase 2-pole squirrel cage induction motor
	Rotation		2950r/min/50Hz
	Insulation class		F
	Quantity		2 Sets
	Startup type		Y-△
	Energy regulation		0-12.5-25-37.5-50-62.5-75-87.5-100%
	Power	kW	152.6	177.2	187.2	202.8	218.2	225.2	259.4	287.8	305.6	343.6
	Current	A	260.4	302.4	319.4	346.2	372.4	384.4	442.8	491.2	521.8	586.8
Evaporator	Type		Shell and Tube Dry Evaporator
	Flow rate	m³/h	12	16	22	24	28	32	38	40	44	48
	Pipe diameter		D125		DN150				DN200
Condenser	Type		Finned type with hydrophilic aluminum fins and high-efficiency inner grooved copper tubes
	Air volume	m³/h	276400	319200	342000	372400	402800	418000	482600	528200	562400	627000
	Power	kW	17.6	20.8	20.8	24	30	36	36	36	36	36
Refrigerant			R23/R404/R407C/R410A/R134a (Customized)
Control Mode			Thermostatic expansion valve / Electronic expansion valve
Overall Dimension	Length	mm	8000	9000	9500	10200	11000	11000	11800	13200	13200	13200
	Width	mm	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200
	Height	mm	2500	2500	2500	2500	2500	2500	2500	2500	2500	2500
Noise		DB	73.1	73.7	74.8	78.4	79	79.2	79.6	79.9	80.4	81.5
Net Weight		kg	1850	6500	7400	7800	8750	9200	9500	9800	10500	11500

Remark:
1. The refrigeration capacity stated above represents the nominal cooling output.
2. Chilled water inlet temperature: -20°C; outlet temperature: -25°C. Ambient temperature: 35°C.
3. Unit safe operating range: Chilled water inlet temperature -28°C to -18°C. Chilled water must be supplemented with antifreeze; a 45% (V/V) ethylene glycol solution is recommended.
4. Power supply configuration: 3P-380V-50Hz. Three-phase four-wire system recommended. Voltage fluctuation tolerance: ±5%; frequency fluctuation tolerance: ±2%.
5. Due to ongoing technological advancements, prior notice cannot be given for any modifications to the above parameters.
Note: The specifications above represent factory standard configurations. Customization is available for special requirements. 

 

Applications

1. Commercial Building HVAC System

Applied to large shopping malls, office buildings, hotels, exhibition centers, gymnasiums and other commercial buildings, providing stable and efficient cooling services for central air conditioning systems. The low noise and low vibration characteristics are suitable for commercial places with high environmental requirements, and the energy saving effect is obvious, which can greatly reduce the operating cost of the building.

2. Data Center Cooling

Data centers have high requirements for cooling stability and energy consumption. Our water-cooled air bearing VFD centrifugal chiller can provide precise temperature control (outlet water temperature 7ºC), stable operation 24 hours a day, and the energy saving effect is 30%~50% higher than that of traditional chillers, which is the core cooling equipment for large and medium-sized data centers.

3. Chemical & Pharmaceutical Industry

Applied to low-temperature reaction, crystallization, distillation, purification and other links in chemical and pharmaceutical production, providing stable ultra-low temperature cooling environment. The oil-free design avoids oil pollution to chemical raw materials and pharmaceutical products, ensuring product purity and safety. The environmentally friendly refrigerant meets the environmental protection requirements of the chemical and pharmaceutical industry.

4. Medical & Health Industry

Used in large hospitals, medical centers, biological laboratories and other places, providing cooling for medical equipment (MRI, CT, laboratory equipment), biological sample preservation, and operating room air conditioning systems. The low noise, low vibration and high stability characteristics meet the strict requirements of medical places, and the oil-free design ensures the cleanliness of the medical environment.

5. Other Large-scale Cooling

It is also widely used in food & beverage factories, industrial parks, power plants, nuclear power plants, airports, railway stations and other large-scale places, providing efficient, energy-saving and stable cooling services, and playing an important role in improving the operating efficiency of equipment and ensuring the normal operation of production and life.

Why Choose Us

Packaging & Shipping

Packaging

•        Multi-layer protection: EPE foam inner layer + waterproof PE film + ISPM 15 steel-wooden crate outer layer.

•        Key components wrapped with shock-absorbing foam; vulnerable parts with anti-collision corners.

•        Clear labels for model, weight and handling instructions; vacuum packaging optional for precision equipment.

 

Shipping

•        Cooperate with top logistics providers (MAERSK, COSCO, DHL/UPS/FedEx Industrial) for global delivery.

•        Sea freight (FCL/LCL) for bulk orders; Magnetic freight for urgent/small-batch goods.

•        Full set of compliant documents provided for smooth customs clearance worldwide.

•        Real-time transit tracking link offered; 24/7 status monitoring available.

 

Delivery Commitment

•        Standard products: 4-5 weeks delivery; customized products: 5-16 weeks (subject to complexity).

•        Global coverage in 50+ countries (Mainly America, Europe, Southeast Asia), on-time delivery guaranteed.

•        Free re-delivery or maintenance for transit damage (after verification).

Company Profile

Founded in 2015, we are a leading manufacturer and supplier of industrial temperature control equipment and systems, dedicated to providing high-quality, reliable and energy-efficient solutions for global industrial clients. With over a decade of R&D, production and international trade experience, we have earned a solid global reputation by adhering to "quality first, innovation-driven, customer-centric" principles.

Our core business covers a full range of industrial equipment: Industrial chillers, industrial thermal oil heaters, industrial boilers, customized heating & cooling solutions and other temperature control equipment. We serve industries including pharmaceuticals, chemicals, aerospace, new energy, electronics, food processing machinery manufacturing, etc., delivering high-performance standard and custom products that meet international standards.
To ensure stable capacity and quality, we run two modern production plants with advanced manufacturing equipment, precision testing instruments and automated lines. These pants integrate parts processing, assembly, testing and packaging into a complete chain. Strict quality control is applied from raw material procurement to delivery, with each batch undergoing rigorous tests to meet top industry standards. Our annual capacity supports bulk global orders, with efficient lead times and flexible scheduling.
We focus on the international market, with a mature global sales and service network. Our products are exported to over 50 countries, mainly America, Europe and Southeast Asia. For American and European markets, we hold authoritative certifications: ASME (pressure vessels) and CE (EU access), which validate our strength and enable access to high-end global markets, we also have ISO certificate.
In Southeast Asia, we cooperate long-term with local distributors, providing timely pre-sales consultation, in-sales support and after-sales maintenance. By adapting to regional needs, our products are widely used in local chemical, pharmaceutical, food processing and new energy projects, supporting local industrial development.
Innovation drives our growth. Our R&D team of senior engineers focuses on developing more energy-efficient, eco-friendly and intelligent equipment. We invest a fixed proportion of annual sales in R&D, cooperating with institutions to launch new technologies and maintain competitiveness.
Looking ahead, global industrial upgrading boosts demand for our equipment. We will adhere to "Internationalization, Branding and Intelligence", expand market share, and strive to become a world-class thermal control solution provider. We aim to build long-term win-win cooperation with global clients as a reliable partner.

Certifications

Q1: What is the required temperature range for the Multi-Compressor Auto-Cascade Cryogenic Freezer?

A1: Our unit can be customized based on -40ºC ~ -160ºC, please inform us of your specific required temperature range (e.g., -80ºC ~ -120ºC).

 

Q2: What is your required cooling capacity for the unit?

A2: Please provide the cooling capacity requirement in kW or BTU, which helps us configure the most suitable compressor and refrigeration system for you.

 

Q3: Do you prefer air-cooled or water-cooled cooling method?

A3: Both air-cooled and water-cooled methods are optional. Air-cooled is suitable for areas with convenient ventilation, while water-cooled is more energy-saving in high-temperature environments. Please inform us of your preference or on-site installation conditions.

 

Q4: What is the power supply standard at your location?

A4: Please provide the voltage, frequency and phase of the power supply (e.g., 380V/50Hz/3Phase), we will customize the unit to match your local power supply standard.

 

Q5: Which industry will the unit be applied to?

A5: Please inform us of the specific application field (e.g., biomedical, lithium battery testing, chemical industry, scientific research), so that we can provide targeted product configuration and solutions.

 

Q6: How many units of the Multi-Compressor Auto-Cascade Cryogenic Freezer do you need?

A6: Please provide the required quantity, which affects the quotation, delivery cycle and preferential terms.

 

Q7: What is your delivery address and required delivery time?

A7: Please provide the detailed delivery address (including country, city and postcode) and the expected delivery time, we will arrange production and shipping accordingly.

 

Q8: Are there any other special requirements?

A8: If you have other special needs (e.g., product customization, international certification requirements, after-sales service requirements, etc.), please feel free to inform us.

 

After receiving your answers to the above questions, our professional sales team will reply to you within 12 hours, providing detailed quotation, product configuration plan, delivery cycle and related service instructions. We are committed to providing you with cost-effective products and professional one-stop procurement services to achieve win-win cooperation!