凹焊缝 凹面焊 凹形焊缝 轻型焊的英文

concaveweld

• 凹:    low-lying area; de ...
• 焊缝:    soldering seam; we ...
• 凹面:    camber concave; co ...
• 焊:    weld; solder
• 形:    form; shape
• 轻型:    light-duty; light- ...