The gear change device is made up with worm and worm wheel.

减速机构由蜗杆和蜗轮组成.

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Functionally, this system is capable to automatic gear - change control, running - parameter dynamic display and auto - shift schedule test.

该系统具有自动换档控制 、 运行参数动态显示和自动换档规律测试等功能.

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