*/*_Multistage compressors are used in industry, because they?

1.	/_Multistage compressors are used in industry, because they?
A.	Reduce the cost of compressor
B.	Reduce the size requirement
C.	Resemble closely to isothermal compression
D.	Are easy to control
Answer» D. Are easy to control

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*/*_Multistage compressors are used in industry, because they?

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/_Multistage compressors are used in industry, because they?