摘要
The article introduces self-shield flux-cored wire semi-automatic downhill welding procedures and all positions gas-shield automatic downhill welding procedures for X70 steel natural gas pipelines.
The article introduces self-shield flux-cored wire semi-automatic downhill welding procedures and all positions gas-shield automatic downhill welding procedures for X70 steel natural gas pipelines.
出处
《压力容器》
2001年第2期49-52,共4页
Pressure Vessel Technology