机具使用脱粒机作业质量差原因分析复式、半复式全喂人脱粒机作业质量不符合要求，大致有如下情况及原因。（１）脱粒不净原因是滚筒与四板间隙过大、滚筒转速过低、喂入不均匀和谷物潮湿等。这时，先使喂入连续均匀，若仍脱不净，应减小四板间隙，适当增加滚筒转速，必要... Machine use threshing machine cause poor quality Analysis Duplex, semi-duplex full feeding thresher job quality does not meet the requirements, generally have the following conditions and reasons. (1) Threshing is not the net reason is the gap between the drum and the four plates is too large, drum speed is too low, uneven feeding and grain moisture. At this time, the first continuous feed, if still off the net, should reduce the gap between the four plates, an appropriate increase in drum speed, necessary ...