71404466
Mar 25, 1938
Jan 24, 1939
TOOTHED GEAR WHEELS, SINGLE-STAGE SPEED-REDUCING AND SPEED-INCREASING WORM GEAR UNITS, SINGLE-STAGE SPEED-REDUCING AND SPEED-INCREASING BEVEL GEAR UNITS, SINGE-STAGE SPEED-REDUCING AND SPEED-INCREASING HELICAL GEAR UNITS, TWO-STAGE SPEED-REDUCING AND SPEED-INCREASING WORM GEAR UNITS, TWO-STAGE SPEED-REDUCING AND SPEED-INCREASING HELICAL GEAR UNITS, THREE-STAGE SPEED-REDUCING AND SPEED-INCREASING HELICAL GEAR UNITS, SPEED-REDUCING AND SPEED-INCREASING GEAR UNITS COMBINING WORM AND HELICAL GEARING, AND SPEED-REDUCING AND SPEED-INCREASING GEAR UNITS COMBINING HELICAL GEARING AND BEVEL GEARING
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