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The unloading system on an air compressor will （）.

单选题
2022-01-03 11:20
A、increase compressor discharge pressure on demand
B、increase compressor operating speed as necessary
C、allow the motor to turn the compressor opposed only by friction
D、reduce the compressor frictional load when starting
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正确答案
C
试题解析
标签： 船舶辅助机械
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