The common method of applying oil to the cylinder walls is by means of small pump assembled in units known as （）.

时间：2019-04-14 07:52:04 关键词：to,oil,the

The common method of applying oil to the cylinder walls is by means of small pump assembled in units, known as （）.

A.mechanical lubricator

B.lubrication function

C.forced feed system

D.bearing lubricatio

答案解析

A

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