Discussing several ordinary processing technologies of valve seat ring and valve stem guide hole of cylinder head now.

对目前气缸盖气门座圈和导管孔的几种一般加工工艺进行讨论。

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Analyzing the many factors of affecting the processing precision of valve seat ring and valve stem guide hole of cylinder head.

对影响气缸盖气门座圈和气门导管孔的加工精度的诸多因素进行分析。

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As the shut-off valve is seated, a passage 41 in its stem connects with ports 42 in the guide bushing 37 so as to allow inlet air to pass though the valve stem to a housing port 44.

在关闭阀是坐在座位上，一个通过41个在其干连接与港口42轴套在指南37，使空气入口，虽然通过的阀干，一个住房端口44。

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