【化学】预制梁地板【建筑】预制梁楼板

precast

precast concrete【建】

prefabricated wall (precast wall)

prefabricated concrete beam (precast concrete girder)

precast concrete compound unit (precastconcrete component)

eccentrically-precompressed precast-concrete pile

prefab construction (precast construction)

precast concrete building block (precast concrete product)