放射线屏蔽用混凝土
concrete for radioactive ray shielding
钢筋混凝土用钢筋
concrete reinforcement steel
滑槽运送混凝土用死起重设备
concrete chuting cable crane
混凝土用钢筋
concrete reinforcing bars
路用混凝土减水剂
water reducing agent for road Concrete
农房用混凝土圆孔板
Concrete hollow floor slab for rural houses
生物屏蔽用混凝土
biological shielding concrete
预应力混凝土用张拉钢丝
stretching wire for prestressed concrete
预制结构用混凝土
precast structural concrete