a transmission having gears actuated by a tumbler.
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- tumbler switch,
- tumbling barrel,
- tumbling box
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a train of gears in which the gear-selection mechanism is operated by tumblers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012