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Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump? l.Its discharge is continuous; ll.It has no internal valves: lll.Upon accidental closing of discharge valve, excessive pressure will not build up()
A.l, ll
B.ll, lll
C.l ,ll.III
D.llonly
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更多 “ Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump? l.Its discharge is continuous; ll.It has no internal valves: lll.Upon accidental closing of discharge valve, excessive pressure will not build up()A.l, llB.ll, lllC.l ,ll.IIID.llonly ” 相关考题
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