It is discovered that aggregate gradation, FAA, plant production temperature and aggregate shape have great influences on the collapse.

 
  • 研究發(fā)現,級配、砂當量、拌合溫度和集料形狀等作用突出。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan