Concrete repairing material for semirigid base of high-grade asphalt road with heavy traffic was prepared by use of rapid-setting and rapid-hardening surphoaluminate cement and special additives.

 
  • 采用快凝快硬硫鋁酸鹽水泥和特種添加劑研制出瀝青路面半剛性基層混凝土修復材料。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan