welding of spiral seam的意思|示意
美 / /
英 / /
螺旋缝焊接
welding of spiral seam的网络常见释义
螺旋缝焊接 ... welding of transverse seam 横缝焊接 welding of spiral seam 螺旋缝焊接 Rail welding seam 钢轨焊缝 ...