level, fungente by compass stretch, to give the exact shape to the emergencies of pairs of tubes, particularly with stoppers with pommel to cup.particularly in the early phase, especially to make them suitable for receiving taps and the like, particularly for obbligante interest

摘要

the device is a combination of a level (3, 4) and a compass (3, 6, 6 ') straight, symmetrical, to give the exact shape to emergencies couples of tubes (9, 9').particularly with stoppers (03) with pommel to cup, particularly in the process of premuratura, particularly to make them suitable for receiving taps and the likeparticularly in obbligante wheelbase.