... welded side seam 熔接缝 butt welded body seam 平焊桶体接缝 strengthening of welded seam 焊缝补强 ...
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文章介绍了熔接缝形成的原因、接缝类型、接缝外观和断口形态特征以及接缝性能评价方法。
In this paper the author introduced the cause, type and appearance of weldline as well as morphological feature of fracture and evaluating method for properties of weldline.
可靠的连接性能：PE管热熔或电熔接口的强度高于管材本体，接缝不会由于土壤移动或活载荷的作用断开。
Reliable connectivity: PE pipe hot melt or fused interface strength is higher than the pipe body, joints will not load due to soil movement or the role of living off.
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