求翻译：转向泵是汽车转向的动力源。目前，解放、东风、长城皮卡、金杯客车等国内主要车型均采用叶片式转向助力泵。这种转向泵装有一个流量控制阀和安全阀，体积小、重量轻、系统连接简单，缺点是噪声较大。是什么意思？

The steering pump is the power source for automotive steering. At present, the main models of liberation, Dongfeng, Great Wall pickup, Jinbei Passenger Vehicle vane power steering pump. The steering pump is equipped with a flow control valve and safety valve, small size, light weight, simple connect

Steering pump is the source of power steering cars. At present, liberation, and easterly winds, and the Great Wall paper cards, Gold Cup, such as buses within the major types of vehicles are in vane-type power steering pump. This steering pump fitted with a flow control valve and relief valve, small