When good and steady service conditions have been achieved, the running surfaces of the piston rings and cylinder liner will be()In addition, the rings will move freely in the grooves and also be well oiled intact, and not unduly worn.

A . hazy light B . hazy light brown C . hazy light blue D . hazy light grey

时间:2022-08-28 09:49:29 所属题库:船舶电气与船舶安全题库

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