["11 ( ( "12 ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( ( ( " " ( pérdida

2017-10-18View Original

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离心泵大泵与小泵相比，其效率大型泵＿＿。(常减压装置) （１)高（２)相等（３)低（４)不好判断答:（１）

Reply #22017-10-18

离心泵大泵与小泵相比，其效率大型泵＿（１)高＿。

Reply #32017-10-19

离心泵大泵与小泵相比，其效率大型泵＿4＿。(常减压装置) （１)高（２)相等（３)低（４)不好判断

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