... 三、止回阀(Check valve) 四、双止回阀(Double check valve) 五、减压回流防止阀(Reduced pressure zone backflow preventer) ...
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... double check system 双重监视系统重复检验制 double check valve 双向止回阀 double check 互相核对 ...
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double check-valve assembly 双逆止阀装置
double check valve plug 二级单向阀螺塞
double check valve arrangement 二级单向阀布置
Double throttle check valve 双单向节流阀 ; 双单向节省阀
double-check valve 双止回阀
Double Check Valve Backflow-Prevention Assembly 双止回阀防回流组件
double-check valve double non-return valve 双止回阀
double pilot check valve 二级先导式单向阀
double pilot elevation check valve 二级先导式提升单向阀
Series 719 Double Check Valve Assembly shall be installed at each noted location.
系列719双止回阀总成应该安装在每个标注的位置上。
DOUBLE CHECK VALVE ASSEMBLY For Low Hazard Cross-connections and continuous pressure applications.
双止回阀总成用于低危险交叉连接和持续压力应用场合。
The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies.
TK - DL可以检测压力真空断路阀,减压防回流阀或双止回阀总成。
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