预制混凝土构件 precast concrete unit ; precast unit ; precast reinforced concrete member ; precast member

混凝土预制件 concrete precast element ; precast concret ; LEGO PC ; [建] precast concrete

预制混凝土组件 precast concrete unit

混凝土构件预制 prefabrication of concrete element

混凝土预制构件 Precast Concrete

水泥混凝土预制件 concrete prefabricate machine

混凝土构件预制工艺 prefabrication of concrete element

装饰预制混凝土构件 architectural casting