常見例句雙語例句Lightweight concrete is a developing constructional materials, and its bond stress mechanism needs more theoretic study.輕骨料混凝土作爲一種新發(fā)展的建築材料，對其粘結(jié)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.道路建築材料是公路與橋梁專業(yè)的一門重要的專業(yè)基礎(chǔ)課，在專業(yè)教學改革中佔有重要的地位。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(yīng)用。 返回 constructional materials