求翻译：本变速器总成始为俄罗斯GAZ车配置，后用于东风，江淮，北京，农用自卸车等。它的前进挡4个，后退档1个，载重1-2吨。壳体材质为灰铁，内部齿轮材质为20饹锰钛。是什么意思？

The beginning of the transmission assembly configuration for the Russian GAZ truck, post for Dongfeng, JAC, Beijing, dump trucks and other farm. It's four forward gears, 1 reverse speeds, load 1-2 tons. Shell made of gray iron, the internal gear 20 Le manganese titanium material.

The gearshift assembly for the Russian GAZ beginning after car used for configuration, Dongfeng, Jianghuai, Beijing, agro-tipper truck. It is the way forward, 4 block back stall load 1 -2, 1 -ton. Shell material for gray iron, internal gear materials for 20 饹 manganese titanium.

This transmission gearbox unit beginning for the Russian GAZ vehicle disposition, latter uses in the east wind, Jiangsu and Anhui, Beijing, the agriculture uses the dump truck and so on.Its forward gears 4, reverse gear 1, carrying capacity 1-2 ton.The shell material quality is the gray iron, the in

Transmission Assembly begins for Russia GAZ car configurations, for after Dongfeng, JAC, Beijing, dump trucks for agricultural use. Block 4, the back 1, 1-2 tons deadweight. Shell made of grey cast iron, titanium internal gears made of manganese 20 饹.

正在翻译，请等待...