A piston in a four-stroke/cycle diesel engine makes four strokes during each （）.<br>A:crankshaft revolution<br>B:mechanical cycle of operation<br>C:period of two combustion cycles<br>D:cycle of two events

A piston in a four-stroke/cycle diesel engine makes four strokes during each （）.
A:crankshaft revolution
B:mechanical cycle of operation
C:period of two combustion cycles
D:cycle of two events

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