【机械工程，照明，加热，武器，爆破】装有周期性变动齿轮的装置

gearing with gears shiftable otherwise than only axially

rotary-drilling machine with gearing for mining

friction gearing

feed gearing (transport gearing)

rack-and-pinion gearing

rolling vane gearing, hydrostatic

variable ratio planetary gearing unit

serial circuit (serial mounting) gearing, hydrostatic