Fan gear mainly by the box, planetary gear speedchangemechanism, and so on.
风机的变速箱主要由箱体、行星轮系和变速机构等构成。
2
The mode gearshift is a multiple speed ratios speedchangemechanism including the clutch or not.
模式换档装置为多速比变速机构，可以不包括离合器。
3
The straight advance rotary shaft (105) of a straight advance HST system speedchangemechanism (35) is associated with an electric motor (170) through a link mechanism (171).