The engine hydraulic stepless speed regulation cooling fan changed the traditional drive type of the engine cooling fan.

发动机液压无级调速冷却风扇，改变了发动机冷却风扇的传统驱动方式。

youdao

Compared with other types of engine's cooling fan-driving system, hydraulic driving system is more reasonable.

与其它类型的发动机冷却风扇驱动相比，液驱风扇系统更合理。

youdao