本文阐述了二次空气阀的结构、工作原理和匹配要点。
This article introduces the structure, operating principle and key matching points of secondary air valve.
排气阀FV-4M1只能采用直立安装方式，因为其工作原理是以浮子垂直上下运动为基础的（参阅图3）。
The FV-4M1 should be mounted only in a vertical position as its operation is based on the vertical movement of the float (see Fig. 3).
介绍了活塞式压缩机可调回流气阀的调节原理、方法和调节机构及其实验结果。
The paper tells of the regulating principle, method, framework and experimental results of the regulating backflow valve for reciprocal compressor.
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