A hose connection type anti-siphon vacuum breaker shall be installed where indicated on the plans to prevent the backsiphonage of contaminated water.是什么意思_A hose connection type anti-siphon vacuum breaker shall be installed where indicated on the plans to prevent the backsiphonage of contaminated water.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句