利用金相及扫描电镜对增压柴油机排气门盘部断裂原因进行了分析。
Failure analysis on the exhaust valve skirt used in supercharge diesel engine was carried out through metallographic and SEM analysis.
现有气门铰刀是固定的，一套铰刀的刀头(刀盘)多达十多只。
The existing valve reamer is stationary, and more than ten bits (cutter heads) of one set of reamers are arranged.
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