伴随着我国20多年改革开放的深入发展,公路、铁路、机场、水利等一系列工程项目在不断地进行改建和扩建,工程机械的需求量也随之猛增,特别是挖掘机从 1998年-2005年累计销量已达到数十万台。随着时间的推移,机械设备由第一阶段的使用期向第二阶段的保养修理期延伸, 同时随着2004年国家宏观调控政策的出 With the deepening of China’s reform and opening up over the past 20 years, a series of engineering projects such as highways, railways, airports and water conservancy projects are being continuously rebuilt and expanded. As a result, the demand for construction machinery has soared. In particular, In 2005 the cumulative sales reached hundreds of thousands of units. With the passage of time, the mechanical equipment will be extended from the service period of the first phase to the maintenance and repair phase of the second phase. At the same time, as the state macro-control policy in 2004