小齿轮传动装置弹簧
pinion drive spring
pinion drive assembly spring
小功率齿轮传动装置
small power gear driving device
拖车驱动装置传动齿轮箱
trailer drive transfer gearbox
齿轮传动装置
cogwheel gearing
gearing
gear drive unit
gear assembly
gear transmission unit
gear system
propulsion gearing systems
gear drive device
Gear