bead welding roll 堆焊轧辊

roll welding [机] 滚焊 ; 热辊压焊接

hot roll welding 热轧焊

roll spot welding 滚点焊 ; 滚点熔接

roll-welding [机] 滚压焊

roll diffusion welding 热轧扩散焊

roll seam welding machine 滚焊机 ; 滚缝焊机

roll-spot welding 滚点焊

roll repair welding 轧辊修复