您要查找的是不是：
- vent pressure vacuum valve 通风系统的压力调节阀
- The vacuum valve opens to admit air. 真空阀开启以补充空气。
- The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies. TK-DL可以检测压力真空断路阀，减压防回流阀或双止回阀总成。
- To complete the training track, exits, the test sample device to recover and return to the orbital module, airlock to vent pressure and a series of complex operations. 要完成在轨训练、出舱、取回试验样品装置、返回轨道舱、气闸舱泄复压等一系列操作。
- Have the year produces8000 abilities of the set set of the each high pressure vacuum chopper. 具有年生产各型高压真空断路器8000台套的能力。
- Have the year produces 8000 abilities of the set set of the each high pressure vacuum chopper. 具有年生产各型高压真空断路器8000台套的能力。
- Description: The electric control valve production, gas control valves, who control valve, steam valve, water valves, vacuum valves, cylinders, tanks, pressure switch, electromagnet. 简介：生产电控阀、气控阀、人控阀、蒸汽阀、水阀、真空阀、气缸、水缸、压力开关、电磁铁。
- pressure vacuum vent valve 真空呼吸阀
- The principle, action and control process of permanent magnet driven machinery were introduced, its characteristic was analyzed, and its application to medium pressure vacuum circuit breaker was expounded. 摘要介绍了永磁操动机构的原理、动作和控制过程，分析了永磁操动机构的特性，阐述了其在中压真空断路器上的应用。
- Introduction to a New Vacuum Valve 介绍一种新型真空阀
- She gave vent to her indignation in a fiery speech. 她在一篇激烈的演说中发泄怒气。
- CCEVV Coolant Control Engine Vacuum Valve 冷却水温控制引擎真空阀
- Negative pressure vacuum heat wall furnace 负压真空热壁炉
- There is a side vent on her skirt. 她的裙子上有一个侧边的开衩。
- Test Procedure for Pressure Vacuum Breakers 压力真空断路阀检测程序
- solenoid-controlled vacuum valve 螺线管控制真空阀
- high - pressure vacuum switch cabinet 高压真空开关柜
- I have to vent my spleen on someone. 我非得找个人出出气。
- He gave vent to his anger by kicking the chair. 他猛踢椅子，以此泄怒。
- The floods found a vent through the dykes. 洪水从堤上的一个裂缝处涌出。
