B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
B23D21/00—Machines or devices for shearing or cutting tubes
B23D21/14—Machines or devices for shearing or cutting tubes cutting inside the tube
Machine à fabriquer des articles à recourbement annulaire, tels que des goupilles fendues, des rondelles faisant ressort (dites Grover), des cosses, des colliers de tuyauterie etc.