back run welding 封底焊

single run welding 单道焊

single-run welding 单道焊

multi-run welding 多道焊

welding run 焊道

multi run welding 多道焊

sealing run welding 封底焊

run of welding 焊道

run of multi-layer welding 多层焊道数

Other welding projects run chart 其他焊接项目历年订单趋势图