First, according to the different chemical pump materials, the following areas of application are: 1) Chemical pumps (stainless steel) are widely used in petroleum, chemical, metallurgy, synthetic fiber, pharmaceutical, food, synthetic fiber and other sectors for the transport of alkaline corrosive media; 2) Chemical pump (fluorine plastic material) is used to transport any acidic and alkaline corrosive medium; 3) Chemical pump (cast iron material) is used for industrial, urban water supply and drainage, and can also be used for irrigation and drainage of farmland and orchard for transporting clean water or other liquids with physical and chemical properties similar to clean water. Second, according to the different uses of chemical pumps, a detailed introduction to its classification: 1) Process flow pump: including feed pump, return pump, circulation pump, flushing pump, sewage pump, replenishing pump, output pump, etc. 2) Utility pump: including boiler pump, cooling tower pump, fire pump, deep well pump for water source, etc. 3) Auxiliary pump: including lubricating oil pump, sealing oil pump, hydraulic transmission pump, etc. 4) Pipeline pump: pump for oil pipeline, pump for loading and unloading truck, etc. Third, according to the working principle, structure classification: 1) Vane pump: When the pump shaft rotates, it drives various impeller blades to give liquid to the pipeline or container by centrifugal force or axial force, such as centrifugal pump, vortex pump, mixed flow pump and axial flow pump. 2) Positive displacement pump: A pump that uses a continuous change in the volume of the pump cylinder to deliver liquid, such as a reciprocating pump, a piston pump, a gear pump, and a screw pump. 3) Other types of pumps: electromagnetic pumps that use electromagnetic energy to transport liquid electrical conductors; pumps that use fluid energy to transport liquids, such as jet pumps, air lifters, and the like. Fourth, according to the transport medium classification: 1) Water pump: including clean water pump, boiler feed water pump, condensate pump and hot water pump. 2) Corrosion-resistant pumps: including stainless steel pumps, high-silicon cast iron pumps, ceramic acid-resistant pumps, impervious graphite pumps, lined hard rubber pumps, hard PVC pumps, shielded pumps, diaphragm pumps, titanium pumps, etc. 3) Impurity pump: including slurry pump, sand pump, sewage pump, pulverized coal pump, ash pump, etc. 4) Oil pump: cold oil pump, hot oil pump, oil slurry pump, liquid hydrocarbon pump, etc. 5. Classified according to the conditions of use: 1) Large flow and micro flow pump: flow rate is 300m3/min and 0.O1L/min respectively; 2) High temperature pump and cryopump: high temperature up to 500 ° C, low temperature to one Z53 ° C; 3) High pressure pump and low pressure pump: high pressure up to 200MPa, vacuum degree is 2.66--10.66kPa (20-80mmHg); 4) High-speed pump and low-speed pump: high speed up to 24000r / min, low speed 5-10r / min; 5 3%; Accurate metering pump: flow metering accuracy of ± 0.3%; 6) High viscosity pump: viscosity up to several thousand pascals (Pa·s). The present invention provides a multifunctional pull faucet, comprising: a faucet body, a drawing part is provided at the water outlet port thereof, and the drawing part is connected to a main channel, wherein at least three are provided in the faucet body A branch channel, and the three branch channels are all connected to the main channel. A multifunctional pull faucet provided by the present invention, wherein the hot water channel, the cold water channel and the water purification channel (pure water channel) are all connected to the main channel , And the main channel is connected with the drawing part on the main body of the faucet, so that the drawing part can obtain the water quality (hot water, cold water, purified water or pure water) required by different users, thereby improving the user experience, and , By integrating the hot water channel, cold water channel and pure water channel (pure water channel) into the main channel, the internal structure of the faucet is simplified, and the production cost of the faucet is reduced. Pull Out Faucets,Pull Out Kitchen Tap,Pull Out Sink Faucet,Standard Pull Out Faucet Yuyao Zelin Sanitary Ware Co., Ltd , https://www.kitchen-sinkfaucet.com