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In some diesel engine designs,()the injection of cylinder oil is timed to impinge when the piston and only impinge on()

发布日期:2021-03-22

In some diesel engine designs,()the injection of c...
A

is coming upward;cylinder ring belt

B

is going downward;piston ring belt

C

is coming upward;piston ring belt

D

is going downward;cylinder ring belt

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