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词汇
upper dead center
释义
upper dead center【机械工程】上静点。upper: adj. 1.(更)上面的,上方的,上部的;较高的;上级 ...dead center: 【机械工程】(冲程的)死点;(车床的)死顶尖。
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更新时间:2026/4/19 5:45:38