pcrd造句

• Since 1970 " s , ten and more poured asphaltic concrete core rockfill dams ( pcrd ) have been built in the northeren region of china
  自七十年代以来，我国北方地区已建成浇筑式沥青混凝土心墙堆石坝十余座。
• At present , the design method , construction technique and equipment has been significantly improved for the pcrd , since much test and study on its material and structural features has been done
  目前，对碾压式沥青混凝土的材料与结构性能进行了大量试验研究，其设计方法、施工工艺和设备较为成熟。