一、前言我省公路建设从一九七三年开始搞养护机械化,十余年来,先后设计生产养护机械近二十余种,有成功,也有失败的,但一直没找到一种理想的养护机械。过去我们生产养护机械一直立足于生产牵引机头,根据工作需要适当配备一些工作尾机,构成所谓一机多用的养护机械。实践证明,过去生产XZ-20型养路机绝大部分作运 I. INTRODUCTION The construction of roads in our province began in 1973 with mechanization of conservation and maintenance. In more than 10 years, we have designed and produced nearly 20 kinds of maintenance machinery. There have been successes and failures, but we have not found an ideal maintenance. mechanical. In the past, our production and maintenance machinery has always been based on the production of traction heads, and we have appropriately equipped some working tails according to the needs of the work, which constitutes a so-called multi-purpose maintenance machine. Practice has proved that in the past, most of the production of XZ-20 road maintenance machines was made into operation.