5. The glass-plate working apparatus according to any one of claims 1 to 4, wherein said first working head means is constituted by a plurality of first working head means, and said second working head means is constituted by a plurality of second working head means. working head means has atleastonegrinding wheel orat least one polishing wheel,or atleastone grind- ing wheeland atleast one polishing wheel, and said atleastone second working head means has atleast one grinding wheel or at least one polishing wheel, or at least one grinding wheel and at least one pol- ishing wheel. 5 10 15 20 25 30 35 40 45 50 55 11 19  EP 3 800 006 A1 20 