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A vacuum is initially established in the first and...

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单选题

A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）

发布日期：2021-03-22

A.vacuum drag from the auxiliary condensate system

B.individual vacuum pumps

C.a single non-condensing air ejector

D.a two stage air ejector

标签： vacuum initially established stages low

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