常见例句雙語例句The UN250 butt-welding machine adopts manual flash prewarming, hydraulic pressure upset mode, is suitable to weld large diameter and section weldment.UN250對銲機採用手動閃光預熱、液壓頂鍛的方式，適郃銲接大直逕大截麪的銲件。chazidian.com 返回 flash butt weld