... 差动线圈 differential coil 差动控制阀 differential control valve 温差排泄阱,温差袪水器 differential (or expansion) drain trap ...
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differential vacuum control valve 差压真空控制阀
differential pressure control valve 差压控制阀 ; 差压调节阀 ; 差压阀 ; 压差控制阀
differential lock control valve 差速锁控制阀
self-operate differential pressure control valve 自力式压差控制阀
dvcv differential vacuum control valve 差压真空控制阀
reliant differential pressure control valve 力式压差控制阀
operated differential-pressure control valve 自力式差压调节阀
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