The valve is preferably one of a gas restriction valve, a throttle valve, and a directional valve.
阀门最好是限气阀,节流阀和方向阀当中的一种。
Jumping of the edge is an important data for the processing quality of the restriction work edge of valve port.
棱边端跳动为阀口节流工作棱边的加工质量的重要指标。
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