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單軌吊車接頭擺角垂直不大于7°,水平不大于()。 A.3° ??????B、4° ??????????C、6° ???????D、7°

作者:煤礦安全網 2022-08-04 09:55 來源:煤礦安全網 單軌 吊車 接頭 水平 C
題目信息:

  單軌吊車接頭擺角垂直不大于7°,水平不大于()。

  A.3° B、4° C、6° D、7°

答案

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