● 可适用于连接球铁管，钢管，PVC管，AC管等不同管外径，减少产品的库存量。
● 密封面大，密封性能好。
● 防腐蚀性能好。
● 安装方便简单，无需要特殊工具。
● 经济型设计。
● 允许管道偏转角度大。
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