底缘 接边焊缝 焊缝根部边缘的英文

rootedge

• 底:    bottom; base
• 缘:    reason
• 接:    come into contact ...
• 边:    side; section
• 焊缝:    soldering seam; we ...
• 根部:    root segment; rhiz ...
• 边缘:    border; edge; frin ...