并重点介绍了采用全自动焊和手工焊的焊接材料及焊接工艺。
Giving emphasis to the welding materials and welding processes of fully automatic welding and manual welding.
文章叙述了X80管线钢的化学成分、力学性能，并重点介绍了采用全自动焊和手工焊的焊接材料及焊接工艺。
This paper depicts the chemical composition, mechanical performance of X80 line pipes, giving emphasis to the welding materials and welding processes of fully automatic welding and manual welding.
针对波纹管与焊接管手工焊接过程中，焊接质量和焊接速度受操作人员的技术水平和工作情绪影响较大的问题，研制开发了一种自动焊接系统。
In the welding of bellow, the quality and speed of welding are affected by the skill and emotion of workers. For sake of this, the paper proposed an automatic welding-machine for bellow.
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