常見例句雙語例句Lightweight concrete is a developing constructional materials, and its bond stress mechanism needs more theoretic study.輕骨料混凝土作為一種新發(fā)展的建筑材料,對其粘結機理還沒有達成共識。Road Constructional Materials is an important basic course of highway and bridge major, and is vital in the specialized teaching reform.道路建筑材料是公路與橋梁專業(yè)的一門重要的專業(yè)基礎課,在專業(yè)教學改革中占有重要的地位。With the development of plastics industry, especially in plastics constructional materials, conical twin-screw extruders are expanding rapidly and applied widely.隨著塑料工業(yè)的發(fā)展,尤其是塑料建材的發(fā)展,錐形雙螺桿擠出機得到了迅速發(fā)展和廣泛應用。 返回 constructional materials