concrete bed混凝土基础concreteadj.具体的；实质性的；混凝土的n.水泥；混凝土；具体物v.凝结；结合concrete bond plaster混凝土粘结层concrete sloping roof混凝土斜屋面concrete under anchor锚下混凝土concrete hollow floor空心楼盖concrete-steel Beam钢混叠合梁concrete catch gutter混凝土溜槽concrete construction混凝土结构concrete slab sleeper轨枕板concrete useful labor具体的有用劳动concrete displacement混凝土换填