【机械工程】变速斜面传动装置，行星齿轮

speed-changing gearing, reversing gear

speed-changing cylindrical gearing planetary gearing

belt speed-changing gearing with cone pulleys

belt speed-changing gearing

speed-changing gear boxes

speed-changing gearing

speed-changing arrangement

speed-changing gearing engaging stepped pulleys for V-belts, belts, ropes