Weldner韦尔德纳weldv.焊接；使结合n.焊接；焊缝welding construction in winter冬季施工welded piping branch junctions焊制三通welding wire of aluminum alloy铝合金焊丝welded hollow spherical joints焊接空心球节点Welding sewn in pressure vessel压力客器焊缝welding rod with acidic coating酸性焊条welding I-shaped crane girder焊接工字形吊车梁Welding of Dimple Jacket Vessel蜂窝夹套容器的焊接制造welding and assembling technics焊装工艺weld between tubesheet and tube管子-管板焊缝