锅筒纵缝焊接
Longitudiual seam welding on drum
纵缝焊机
longitudinal seam welding machine
longitudinal seam welder
纵缝焊接操作机
welding manipulator for longitudinal seam
纵焊缝未融合
Non-fusion in Longitudinal Weld Seam
纵向电阻缝焊机
longitudinal resistance seam welder
纵向焊缝
longitudinal seam
longitudinal weld
longitudinal welding seam
纵向焊缝余高
longitudinal weld reinforcement
环缝焊∥焊接辅助装置
girth welding∥welding auxiliary device
环焊缝焊接接头力学性能试验
mechanical properties test of circular welded joints