1·A type of quick-opening valve whose orifice is opened and closed by a disk that pivots on a shaft in the throat of the valve.
一种快开式阀门，其孔口的开启和关闭靠装在阀门颈部枢轴上的圆盘。
2·Steam flow measurement is achieved by the use of a calibrated orifice plate and differential pressure transducer.
蒸汽流量的测量是通过用一个可测量孔口直径的压力传感器来实现的。
3·The main sources of the orifice flowrate' uncertainty were discussed, and then the theory basis for the precision control was provided.
探讨了孔口流量计流量不确定度的主要来源，为精度控制提供了理论依据。
4·The forming cutter can usually be used to process the orifice chamfering, but when the chamfering radius is special, it is more difficult to use the traditional method to process.
加工孔口倒圆角时，通常可以用成型刀来加工，但是当倒角半径比较特殊时用传统的方法加工就比较困难。
5·Compressor working chamber is not interlink with the suction, exhaust orifice at the same time, without setting suction, exhaust valve, in this regard to reduce the intake, exhaust losses.
压缩机工作腔不与吸、排气孔口同时相通，无需设置吸、排气阀，这一方面减少了进、排气损失。