排灌机械是使用量大、应用面广的产品。目前我国排灌机械的生产企业有 2000多家，产品有 70多个系列、 1500多个规格，品种基本齐全。据中国农机工业协会排灌机械分会不完全统计，全国农用水泵的年产量约达 350万台，喷、滴、微灌设备的产量近 2万台 (套 )。 　　改革开放以来 Irrigation machinery is the use of large, widely used products. At present, China’s irrigation and drainage machinery manufacturing enterprises have more than 2,000, the product has more than 70 series, more than 1,500 specifications, the basic complete varieties. According to incomplete statistics of the Drainage and Irrigation Machinery Branch of China Agricultural Machinery Industry Association, the annual output of agricultural pumps in the country is about 3.5 million sets, and the output of spraying, dripping and micro-irrigation equipment is nearly 20,000 sets. Since the reform and opening up