Hand distance control for main case, double H shift mode. Automatically shift by compressed air for auxiliary case. The differential locks by the compressed air in cylinder pushing joint sleeve.

• 主变速器为手动换档远程操纵，双H式换档方式，副变速器由压缩空气自动换档。差速锁的锁止是通过气缸压缩空气推动接合套实现。