单项选择题

An acceptable method of measuring for the correct rotational force applied to the connecting rod and main bearing bolts, is to use a（）

A.torque wrench
B.monkey wrench
C.pipe wrench
D.slugging wrench

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C.octane number of 55
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船舶电气与船舶安全

An acceptable method of measuring for the correct rotational force applied to the connecting rod and main bearing bolts, is to use a（）