背负式喷雾器。因其结构简单、使用方便、价格便宜，至今仍是我国农村尤其是山区农民重要的植保药械。它广泛用于棉花、粮食、果树、蔬菜及烟叶等作物的病虫防治工作中。但农民朋友常缺乏正确的保养和维修技术，致使在实际操作中产生许多不便。笔者结合多年来的实践经验，现将 Knapsack sprayer. Because of its simple structure, easy to use, cheap, is still China’s rural areas, especially mountain farmers important plant protection equipment. It is widely used in pest and disease control of crops such as cotton, grain, fruit trees, vegetables and tobacco. However, farmers and friends often lack the proper maintenance and repair techniques, resulting in many inconveniences in practice. The author combines years of practical experience, now