The crack between the coped and hole was removed by air arc and then repaired by welding.

 
  • 在修割邊和鉆孔之間的裂紋用氣弧消除,然后進(jìn)行焊補。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan