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Henry H. Ryffel

Henry H. Ryffel

No biography available.

Works (5)

Cover of Machinerys Handbook

Machinerys Handbook

Cover of Gear design simplified

Gear design simplified

Cover of Machinery's Handbook + Digital Edition

Machinery's Handbook + Digital Edition

Cover of Design of worm and spiral gears

Design of worm and spiral gears

Cover of Machinery's Handbook

Machinery's Handbook

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