It is well known that breakout is the most serious accident in casting,it will cause a huge direct or indirect economic loss.

 
  • 眾所周知漏鋼是連鑄生產(chǎn)中最為嚴重的生產(chǎn)事故,造成巨大的直接和間接經(jīng)濟損失。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan