阀

• Several different types of valves are in use. some are back pressure valves .
  有几种不同的阀在使用中，有些是反向压力阀。
• The apparatus consists of a bulb of known volume and valve block or manifold .
  仪器由一个已知体积的球管和一个阀组或管网所组成。
• If the pressure builds up excessively, the pressure valve opens to relieve the pressure .
  如果油箱内压力过高，则压力阀开启，以降低压力。
• The wastewater samples is transmitted by an air-operated aspirator to the liquid injection valve .
  用气动吸引器将废水试样送入液体注射阀。
• Since the engine has no valves, it doesn't need any camshaft, valve lifters and so on .
  因为发动机没有阀门，它不需要任何凸轮轴、起阀器等。
• The solenoid plunger pulls the vent valve down, blocking off the passage to the charcoal canister .
  电磁柱塞拉下通气阀，堵住通向活性碳罐的通路。
• The latter may be used with bypass or throttling valves in the tower water pipework circuit .
  近来，可采用在冷却塔的水管系统中设置旁通阀或节流阀。
• A canister purge valve is opened periodically to vent the vapor back into induction system .
  收集器的清除阀周期性地开启，泄放蒸气使之返回进气系统。
• The large holes on the left and right represent the inlet and exhausting valve ports respectively .
  左右两侧的两个大孔，分别表示进气阀孔和排气阀孔。
• Now, when the engine is started, the hot exhaust gases are deflected by the closed heat-control valve .
  现在当发动机起动时，关闭的热控制阀引导热废气。