double check valve

常見例句

The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies.
TK-DL可以檢測(cè)壓力真空斷路閥，減壓防回流閥或雙止回閥總成。
Pre-installation required to double-check valve, and clear the valve internal transport, storage process of the damage caused.
安裝前需仔細(xì)檢查閥門，并清除閥門內(nèi)在運(yùn)輸、存放過程中造成的損害。
Double Check Valve Assembly shall be installed at referenced cross-connections to prevent the backflow of polluted water into the potable water supply.
在相關(guān)的交叉連接處應(yīng)該安裝一個(gè)雙止回閥總成，以防止受到污染的水回流到飲用水系統(tǒng)中。