中文原文：

B. 动力换档变速箱

多档动力换档变速箱，为平行轴(定轴式)传动结构。由液压控制的多片式摩擦离合器，能在带负荷状态(不切断动力)下接合与脱开，也就是动力换档。所有传动齿轮均由滚动轴承支承，齿轮与齿轮之间为常啮合传动。 各齿轮、轴承及离合器均由经冷却后的油进行润滑。 变速箱有三个多片湿式摩擦离合器，换档时相应的离合器摩擦片被轴向作用的油压所推动的活塞压紧。离合器摩擦片的松开是靠螺旋弹簧的作用力将活塞推回。

英文译文

B. Power shift gearbox

The multi-geared power shift gearbox is a parallel shaft (countershaft) transmission structure. The hydraulically-controlled multi-disc friction clutch can engage and detach in a loaded state (without cutting off the power), which is the so-called power shift. All the transmission gears are supported by rolling bearings, and transmission is realized by the constant engagement between the gears. All the gears, bearings and clutches are lubricated by the oil that has been cooled off. The gearbox has three wet multi-disc friction clutches, and during gear shifting, the clutch discs are pressed by the oil pressure-driven piston acting along the shaft. The loosening of the clutch discs relies on the force of the coil spring to push the piston back.

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