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"Gear" can mean two different things. In engineering /tech speak, a gear is a way of trading power for speed, or the other way around, as is done in the gear box/transmission of a car for instance. But "gear" in everyday language can simply mean "stuff", "things" or "equipment". You can have swimming gear, safety gear, camping gear etc.
lever, gear train
they practice there scene or what they are told to do in a match also put there gear on
There is a picture of a gear in the related link. a gear tooth is one of the things on the outside of the gear that sticks out. This gear has 18 teeth.
What are the two d's on the gear shift for>
An idler gear is a gear which connects two other gears so they will turn in the same direction. :)
This can be numerous gears, but a worm gear is extreme between the two sizes of gears.
When gear is explained in connection with gear train, it is an individual member of a gear train. That is a gear train a power transmision system containing two or more gears.
There are two gear control cables which come from gear box to gear gaiter. Usually they need to be replaced, or one of them
Because many bikes offers two places where the gear can be changed, by the crank and by the rear wheel. These gear changers or derailers, are operated by separate levers.
They weren't 'invented' - a gear ratio is simply the difference in the number of teeth on two connected gear wheels.
3 sets of two tires. Two rear landing gear and one front landing gear.