农业机械在田间作业时，往往存在着容易被人们忽视的危险因素，以致酿成事故。下面列举几种常见的危险因素及其预防办法。（１）挤压危险两部件相对运动，且有一个作圆周运动时，如相互啮合的齿轮，链条与链轮齿，输送带与带轮，加工机械的主、从动件及脱粒机滚筒喂入处等... Agricultural machinery in the field operations, there are often easily overlooked by the risk factors, resulting in accidents. Here are some common risk factors and their prevention. (1) Danger of extrusion relative movement of two parts, and there is a circular motion, such as intermeshing gear, chain and sprocket teeth, conveyor belt and pulley, the main processing machinery and follower and thresher roller Entrance etc ...