具有反虹吸功能,可用于饮用水软管连接到软管螺纹水龙头的场合.Provides back siphonage protection for portable hoses connected to hose thread faucets.系列757, 757N可以安装在持续压力应用中,并且可能与反压力和反虹吸相关.Series 757, 757 N be installed under continuous pressure and be ...
Being tall can make you feel incredibly self-confident.个子高会使你感觉极其自信。Stubborn, self - confident Guo Zhenshan has never gone crawling to anyone.坚强 、 自信 、有气魄的郭振山,实在说,永远也不会向人低三下四啊!Self - confident , ambitious and positive, P...