The whole production process in iron and steel industry is decomposed correlatively into two parts: the material flow process and energy flow process.

 
  • 摘要把大型鋼鐵企業(yè)的生產(chǎn)系統分解為相互關(guān)聯(lián)的物質(zhì)流動(dòng)和能量流動(dòng)過(guò)程兩部分。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan