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2017-08-31View Original

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Reply #22017-08-31
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Reply #32017-08-31
"锁开锁关阀门与常开常关阀门的区别",
Reply #42017-08-31
"正常的PID图纸上有锁开,锁关阀门,有些还设置了常开常关阀门,请问这些阀门的设置有什么原则?锁开和常开阀门有什么区别?",
Reply #52017-09-01
"锁开 是联锁动作后开,常来是正常工况下开",

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