... : Switzerland to Sri Lanka Hall nza300, zb700 worm grinding machine, precision grade 5-6.Germany Niels 630,1500 single ... grinding machine, precision 6-7.Surface grinder, internal grinder, cylindrical ... , precision lathes, and gear hobbing machine and so the whole system equipment.Grinding equipment specifications NZA300ZB700NRS500NRS1250 precision 5-66-777 ...