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.

youdao

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.

youdao