When installing rings on a diesel engine piston you should check the ring_.A.diametrical

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When installing rings on a diesel engine piston, you should check the ring_.

A.diametrical tension

B.gap clearance

C.radial thickness

D.face thickness

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗