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不锈钢封头. 焊接.三通. 法兰 

无直边封头                                 椭圆封头(标准封头)                     浅型封头

平底                                             球形封头                               锥型封头

半球型旋边                                   膨胀节                                      U形圈带封头

A3大小头旋边                          不锈钢大小头旋边          桶体旋边
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