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当前学科:主推进动力装置
题目:
单选
四冲程柴油机压缩冲程所占的曲柄转角等于()
A . 180°-进气提前角
B . 180°+进气提前角
C . 180°+进气延迟角
D . 180°-进气延迟角
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