weld junction meaning in Chinese

熔焊线
熔合线，焊口

Slag, blowholes, and paint on unfused regions were observed at the welded junctions .
在焊接处看到了夹渣，气孔及未熔透区的油漆。
Based on the construction of guangzhou metro line 3 welding process and quality control , this paper introduces the mobile contact welding , analyzes some key points during the process of welding , such as welding of rails in curved sections , environmental protection , the measurement of straightness on the welding junctions located in curved sections , the maintenances of equipment etc . , holds that more attention shall be given to these points
摘要介绍了移动式接触焊在广州地铁3号线中的施工工艺及施工过程；分析施工过程中应该注意的曲线钢轨焊接、环境保护、曲线钢轨焊接接头平直度的测量、设备维修保养等技术要点。