["[" [{"text": "【Chaque jour une question de é le forum de discussion éé technique d échange é"}],

2018-01-18View Original

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z[" [{"text": " Participation : 3 réputation ;; Réponse correct correct正确正确; juste :z; 48 heures z; dans z; 48 heures; heuresz;."],], [{"text": " Choisissez deux unitames Bz"}],

Reply #22018-01-18

[{"text":z Pour "z""}]

Reply #32018-01-18

B.. .......

Reply #42018-01-18

两台同型离心泵，单独向某系统供液时，工作扬程接近关闭扬程，如希望得到尽量大的流量，应（A）使用。 A．串联 B．并联 C．视液体性质而定 D．视排出容器高度而定

Reply #52018-01-18

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