This paper makes a systematic analysis on the defects of the sphere which easily happen in the course of erecting and welding and puts forward some corresponding control measurements.
文章对球罐在安装焊接过程中易产生的缺陷进行了系统的分析，并提出了相应的控制措施。
At present, there is not special technological criterion or specification in China for manufacturing and welding steel structure of railway bridge girder erecting machine.
目前，国内在铁路架桥机钢结构的制造及焊接工艺方面，还没有专门的规范或规程。
A base is formed by erecting and welding Angle irons, and terrestrial heat tubes are arranged under floors and are sealed through heat insulating layers.
底座采用角铁架设焊接而成，在地板的下面设有地热管、通过隔热层将地热管密封。
应用推荐