单选题A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.Adouble-acting engineBopposed pistons engineCsingle-acting engineDhorizontal acting engine
单选题
A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.
A
double-acting engine
B
opposed pistons engine
C
single-acting engine
D
horizontal acting engine
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