The technical project adopted in present invention can help control remaining gap of the air cylinder as little as possible to improve volumeefficiency.
采用本发明的技术方案,可以将气缸的余隙尽可能控制得小,以提高容积效率。
3
Also the manufacturing precision of water hydraulic gear pump, especially gear surface and side flank, is required in order to improve its volumeefficiency.