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【单选题】

压差发电膨胀机与发电机转速差高联锁( )rpm

A.
10
B.
20
C.
30
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参考答案:
参考解析:
.
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A.
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B.
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C.
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【单选题】某多轴电机转速为3000转,是指

A.
每分钟3000转
B.
每秒钟3000转
C.
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