... extrusion Moulding machine 1,Patented Approved, Long Working life 2.Not Rusty,Automatic Operation,easy 3.smooth Hollow Wall panel extrusion Mouding machine ... Haitian is a professional producer of pre-stressing concrete hollow core slab forming machine. ... available:Product NamesTypesModing SpeedHolesHoles DiametersHollow Core Slabs Molding Machine 120x600 1.2---1.4m/min 5 ...