特殊用法epicyclic gearbox1.行星齿轮箱, 行星式变速箱feed change gearbox1.进刀箱, 进给箱front head gearbox1.(直升飞机)前旋翼减速器head gearbox1.(直升飞机)旋翼减速器pick-off gearbox1.速度变速箱, 走刀箱positive speed gearbox1.减速箱two-speed gearbox1.双速减速机