联合收割机运动参数的选择□张广成前进档位的选择影响机组正常工作的主要因素是喂入量。作业中，应根据所收谷物的品种、产量、成熟程度、高度等因素和允许喂入量，综合调整收割速度、割茬高度和收割幅宽，保证机具在额定的负荷下工作。宜采用低速Ⅰ档、Ⅱ档或Ⅲ档工作... Combine harvester motion parameter selection □ Zhang Guangcheng  choice of forward gear affect the normal operation of the main factor is the amount of feed. During the operation, the harvesting speed, cutting height and harvesting width should be adjusted according to the variety, yield, maturity, height and other factors of grain received and the allowable feeding amount, so that the machine can work under the rated load. Should adopt low-speed Ⅰ file, Ⅱ file or Ⅲ file work ...