分析了手工下向焊、半自动焊、自动焊及特种焊等焊接方法的特点，在选择焊接方法时应考虑管道直径、壁厚、管道长度、设计条件、管子级别等因素。

The features of manual downhill welding, semiautomatic welding, automatic welding and other welding technologies like butt flash welding and laser beam welding (LEW) and so on are analyzed.

youdao

拥有两种收弧模式和焊后削小球功能，适合半自动、自动焊、机器人等不同的高性能焊接工艺需求。

Possessing two methods of arc extinguishing and function of ball cutting after welding, suitable for different high performance welding procedures of semi-automation, automation and robot.

youdao

拥有两种收弧模式和焊后削小球功能，适合半自动、自动焊、机器人等不同的高性能焊接工艺需求。

Possessing two methods of arc extinguishing and function of ball cutting after welding, suitable for different high performance welding procedures of semi-automation, automation and robot.

youdao