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【单选题】

In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means ().

A、piston crown

B、piston ring groove

C、piston skirt

D、piston ring area

更多“In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means ().”相关的问题
第7题

A、A.This Sentence refers to the validity of the Certificate  B、B.This Sentence refers to the time of the Certificate  C、C.This Sentence refers to the date of the Certificate  D、D.This Sentence refers to the issue of the Certificate  

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