Although the class of artificial dinas is low, it is possible to compound dense concrete of high quality if proper compounding rate is chosen.

 
  • 雖然人工砂石的級配較差,但只要選擇合適的混凝土配合比,是完全可以配制出高性能的自密實(shí)混凝土。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan