["【每日一題】22

2017-12-03View Original

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Reply #22017-12-03

继续翻译剩余的文本。

Reply #32017-12-03

一般离心泵起动时，出口阀必须( 关闭 )，原因是根据泵的特性曲线，( 当流量为0时，起动功率最小 )，从而很好地保护电机，同时也能避免出口管线水力冲击。

Reply #42017-12-03

关闭 ,当流量为 0 时,起动功率最小

Reply #52017-12-03

关闭泵启动时电流最大

Reply #62017-12-03

关闭。当流量为 0 时,起动功率最小

Reply #72017-12-03

关闭当流量为0时，起动功率最小

Reply #82017-12-03

关闭、当流量为0时，起动功率最小

Reply #92017-12-03

关闭当流量为0时，起动功率最小

Reply #102017-12-03

关闭 ,当流量为 0 时,起动功率最小

Reply #112017-12-03

（关闭）（当流量为 0时,起动功率最小）

Reply #122017-12-03

关闭当流量为 0时起动功率最小

Reply #132017-12-03

关闭 ,当流量为 0 时,起动功率最小.

Reply #142017-12-03

一般离心泵起动时,出口阀必须( 关闭 ),原因是根据泵的特性曲线,( 当流量为 0 时,起动功率最小 ),从而很好地保护电机,同时也能避免出口管线水力冲

Reply #152017-12-03

关闭 ,当流量为 0 时,起动功率最小

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