2011年是我国“十二五”规划开始的第一年,也是国家经济和货币政策调整的一年。在这一年中,工程机械行业受多方面因素影响,增长速度较之前几年放缓,一些工程机械产品出现了负增长的情况,压路机行业就是一个例子。根据中国工程机械工业协会统计的数据,我们对2011年压路机的销售和市 2011 is the first year in China’s “Twelfth Five-Year Plan” and also a year in which the state’s economic and monetary policies are adjusted. During the year, the construction machinery industry was affected by many factors, the growth rate slowed down compared with previous years, and some construction machinery products experienced negative growth. The roller industry is an example. According to China Construction Machinery Industry Association statistics data, we 2011 sales of roller and the city