The qualified reinforced bar is produced by designing chemical composition and developing QTB residual heat treatment process.

 
  • 介紹了英標460B鋼筋的研制情況,通過(guò)成分設計和開(kāi)發(fā)QTB余熱處理工藝生產(chǎn)出合格的鋼筋。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan