Large span roof slab machine works on the long-line table, using the high-strength low-relaxation steel strand as the guide, using the pushing work method to forming the concrete hollow-core slab. The slab have the advantages of smooth surface, high-density structure, capable of making construction slabs of 4.2m to 18m. The ZB&GLY series concrete hollow-core slab mainly used on the larger bay workshop, school, hospital, shopping mall, office building, bulk storage plant etc.