基本解釋雙止回閥；雙單向閥英漢例句雙語(yǔ)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(mén)，并清除閥門(mén)內(nèi)在運(yùn)輸、存放過(guò)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。double check valve更多例句詞組短語(yǔ)短語(yǔ)double -check valve non-return valve 雙止回閥double check -valve assembly 雙逆止閥裝置Double Check Valve Backflow -Prevention Assembly 雙止回閥防回流組件double check valve更多詞組專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)雙止回閥