Some coarse gravel loaded by the river deposited in the river channel.
河流携带的部分粗砂砾在河床上形成滞留沉积。
Coarse gravel or crushed rock laid to form a bed for roads or railroads.
支撑公路或铁路的用泥土或岩石做成的路基。
Tailing and coarse gravel from iron ore mining and dressing are produced into tailing brick instead of conventional aggregates and clay.
利用铁矿采选过程中产生的尾矿及粗粒砂石代替传统砌块生产中的部分骨料及粘土生产尾矿砖。
应用推荐