The rotary motion of a diesel engine crankshaft is obtained from the up and down motion of

职业资格 公共英语 已帮助 人

The rotary motion of a diesel engine crankshaft is obtained from the up and down motion of the piston via the _____.

A.camshaft

B.reduction gears

C.rocker arm

D.connecting or piston rod

请帮忙给出正确答案和分析,谢谢!

热搜:a类火灾b类火灾c类火灾e类火灾都能用的灭火器是