In a four-stroke/cycle diesel engine, after the completion of the power stroke, the piston will move（）
- Aup and draw in a fresh air charge
- Bdown to burn off fuel
- Cdown to compress the fuel air charge
- Dup and force out the exhaust gase
问题
In a four-stroke/cycle diesel engine,
参考解析：
分类：船舶电气与船舶安全题库
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