霍尔锚的抓力系数和链的抓力系数一般分别取为______。
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霍尔锚的抓力系数和链的抓力系数一般分别取为______。
A.2~3,0.55~1.5
B.2~3,0.75~1.5
C.3~5,0.75~1.5
D.3~5,0.55~1.5
参考答案:
霍尔锚的抓力系数和链的抓力系数一般分别取为______。
A.2~3,0.55~1.5
B.2~3,0.75~1.5
C.3~5,0.75~1.5
D.3~5,0.55~1.5
参考答案: