WDY2．5步履式液压挖掘机（图1）具有性能先进，结构新颖、简单，重量轻，维护方便的特点，其成本只有同等级履带挖掘机的50％左右。主要用于房屋基槽、各类管道、电缆沟和市政工程等小型土方工程的挖掘，尤其适合中小型施工企业选用。图1WBY2．5步履式液压挖掘机1主要技术参数 WDY2.5 walking hydraulic excavator (Figure 1) has the characteristics of advanced performance, novel structure, simple, light weight, easy maintenance, and its cost is only about 50% of the same level crawler excavator. It is mainly used for the excavation of small earthworks such as building foundation trenches, various types of pipelines, cable trenches, and municipal works, especially for small and medium-sized construction companies. Figure 1 Main technical parameters of WBY2.5 walking hydraulic excavator 1