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Henry H Ryffel

Henry H Ryffel is the author of "Design of Worm and Spiral Gears", "Machinery'S Handbook Guide, 27Th Edition - Ebook Activation Key", "Machinery's Handbook Guide" and "The Use of Handbook Tables and Formulas".

Books by Henry H Ryffel
Mathematics at Wo...
Norton, Holbrook
Paperback: $20.95
Gear Design Simpl...
Jones, Franklin D.
Paperback: $34.95
Machinery's Handb...
Oberg, Erik
Hardback: $55.00
Machinery's Handb...
Oberg, Erik
Hardback: $48.00