Description
Class B23D : PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
Subclass 3/02: Planing or slotting machines cutting by relative movement of the tool and workpiece in a vertical or inclined straight line for cutting grooves (cutting helical grooves B23D 5/02)