PPR管哈夫三通/尼龙管半包法兰三通 用于管道的直管部位发生砂眼、裂缝、断裂的抢修。1. 结构长度短,其结构长度只有传统法兰止回阀的1/4~1/8; 各种安全阀都应垂直安装。 3、因速闭作用,可防止介质倒流]球墨管开边快接三通/ABS管全包式哈夫三通
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