water pump seal cup.
泵水封皮碗
The casing pump includes the pressure test device, speed reducer and sealing cup.
套管泵由压力检测装置，减速装置和密封皮碗等组成。
Air dusting is used by the exhaust gas flow of air pump mixing Cup incorporate both.
气流喷粉是用气泵排气, 气流堵住喷粉杯不兵两栽。
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