In the two stroke diesel engine, it is designed so that the oil impingement is timed to proceed only on the piston ring belt during（）<br>A:compression stroke<br>B:suction stroke<br>C:expansion stroke<br>D:exhaust stroke

In the two stroke diesel engine, it is designed so that the oil impingement is timed to proceed only on the piston ring belt during（）
A:compression stroke
B:suction stroke
C:expansion stroke
D:exhaust stroke

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