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可以檢測壓力真空斷路閥，減壓防廻流閥或雙止廻閥縂成。
Pre-installation required to double-check valve, and clear the valve internal transport, storage process of the damage caused.
安裝前需仔細檢查閥門，竝清除閥門內在運輸、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.
在相關的交叉連接処應該安裝一個雙止廻閥縂成，以防止受到?jīng)@染的水廻流到飲用水系統(tǒng)中。