常见例句双语例句The UN250 butt-welding machine adopts manual flash prewarming, hydraulic pressure upset mode, is suitable to weld large diameter and section weldment.UN250对焊机采用手动闪光预热、液压顶锻的方式，适合焊接大直径大截面的焊件。chazidian.com 返回 flash butt weld