Gears of first stage are changeable so that the operator can change the gear ratio based on current field condition.
第一级传动齿可变,驾驶员可根据电流与磁场情况来改变齿数比。
2
The clutch is also used to disengage the engine from the drive train whenever the gears in the transmission are being shifted from gear ratio to another.
此外,在改变变速器齿轮的传送比时(换档时),离合器也被用于切断传动系与发动机之间的连接。
3
For instance, in a device with two gears, if one gear is twice the size of the other, the ratio would be 2:1.