输送车系统（1）具备：轨道（2）；

The transport vehicle system (1) comprises the following components: a rail (2);

输送车(3)在轨道(2)上行驶。

The transport vehicle (3) operates on the rail (2).

这篇论文探讨混凝土搅拌输送车液压控制系统设计中的关键问题。

This paper discusses the key problems in the design of hydraulic control system of concrete agitating lorry.