正确答案: D
样板和塞尺
题目:活塞环槽磨损后,用_______进行测量
解析:D
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举一反三的答案和解析:
[单选题]Vessels having main engines arranged for air starting are to be provided with at least__.
two air starting containers of approximately equal size
[单选题]DOC的有效性取决于在周年日______实施的证明SMS是否有效运作的年度审核。
前或后3个月内
[单选题]活塞销表面硬度高,耐磨性好,心部则具有较高的_______
韧性