Due to action of pistons some relative motion between parts in contact in the coolant supp

Due to action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.

A.reciprocating

B.rotating

C.running

D.removing

请帮忙给出正确答案和分析,谢谢!

  • 悬赏:0 答案豆
  • 提问人:00****23
  • 发布时间:2017-01-25
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