00859    a2200157   4500003000500000005001700005040000900022082001600031100002100047245012800068250001200196260003200208300001100240505042400251650002600675Nust20230320111357.0  cNust  a621.944,COL  aColvin, Fred H.   aGear cutting practice :bmethods of producing gears for commercial use including war time data supplement /cFred H. Colvin  a2nd ed.  aNew YorkbMcGraw Hillc1943  a370 p.  aGears and Gear Cutting Practice (Page-1), Spur Gears and Circular Cutters (Page-55), The Shaping Method of Cutting Gears (Page-103), Helical and Herringbone Gears (Page-118), Hobs and Cutters (Page-142), Bevel Gears (Page-164), Worms and Worm Gears (Page-192), Internal Gears (Page-210), Burnishing, Shaving, Lapping and Grinding Gear Teeth (Page-230), Heat Treatment of Gears (Page-255), Inspection Methods (Page-271).  aGear cutting practice