Machines for manufacturing hollow parts or hollow bodies by blowing a plastic material, recycled or otherwise; machines for manufacturing hollow parts or hollow bodies by blowing and molding a raw material; machines for manufacturing hollow parts or hollow bodies by blowing and molding preforms; manufacturing machines for blow-molding bottles and plastic containers; injection blow machines; extrusion blow-molding machines; feeder hoppers for raw materials (machine parts); preform feeder machi...