inherent stress concrete beam 预应力混凝土梁

inherent stress concrete girder 预应力混凝土大梁

inherent stress concrete coping 预应力混凝土盖梁

inherent stress concrete structure 预应力混凝土结构

inherent stress concrete box-beam 预应力混凝土箱梁

inherent stress concrete pipe pile 预应力混凝土管桩

no-bonding inherent stress concrete 无粘结预应力混凝土

inherent stress concrete channel beam 预应力混凝土槽形梁