... exhaust valve spring 排气阀弹簧 exhaust valve stem 排气阀杆 exhaust valve tappet 排气阀挺杆 ...
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exhaust valve stem diameter 排气门柱直径
storage box exhaust valve stem 储梗箱
·2,447,543篇论文数据，部分数据来源于NoteExpress
By means of macroscopic analysis, chemical composition analysis and microstructure examination, the cracking reason of engine exhaust valve stem has been studied.
采用宏观断口分析、化学成分分析及金相检验等方法，对发动机排气门杆断裂原因进行了分析。
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