Series SS007QT Stainless Steel Double Check Valve Assemblies provide protection of the potable water supply for non-health hazard cross-connections.是什么意思_Series SS007QT Stainless Steel Double Check Valve Assemblies provide protection of the potable water supply for non-health hazard cross-connections.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句