What is "gearboxes"

Usage examples of "gearboxes".

Ideas radiated from the town: weaving machines, gearboxes and windmills, factory postures.

He wouldn’t be at all surprised now if they were to find gearboxes with cogwheels the size of moons driving the entire edifice.

The whine of the gearboxes grew in pitch and the tank lurched ahead as the clutches engaged, the heavy tracks slapping down on the solid rock of the Road.

The Cliaandians did not think this way, which was why I intensely enjoyed dropping gravel in their gearboxes, but I still did.