农业部与国家质量技术监督局于今年“三夏”期间对河北、山西等５省进行了联合收割机质量跟踪调查。调查显示，联合收割机的作业性能基本满足农业生产的需要，但是总体质量水平尚有一定差距，存在以下几个突出问题：一是联合收割机的使用可靠性不高，故障较多。二是“三包”服 The Ministry of Agriculture and the State Bureau of Quality and Technical Supervision conducted a survey on the quality of the combine harvesters in five provinces including Hebei and Shanxi during this year’s “Three Summers”. The survey shows that the operational performance of a combine harvester basically meets the needs of agricultural production, but there is still a certain gap in the overall quality level. There are several prominent problems as follows: First, the reliability of the combine harvester is not high and there are many faults. Second, “Three Guarantees” service