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An acceptable means of tightening connecting rod and main bearing cap bolts is to measure the （） Ⅰ.torque applied to each nut and bolt assembly Ⅱstretch of each nut before and after tightening
A:Ⅰonly
B:Ⅱ only
C:both Ⅰ and Ⅱ
D:neither Ⅰ nor Ⅱ

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出自：海船船员证

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