A new type of dust cleaning device for unprocessed grain is studied and designed.
2
解吸平衡水分与温度和相对湿度有关,与原粮水分无关。
Releasing equilibrium moisture relate to temperature and relative humidity, but not to the original moisture content of grain.
3
建国以来黄淮海平原粮食单产持续增长,近年来仍然高于全国同期单产增速。
Grain yield per unit area increased continually during the past near 50 years in HuangHuai -hai plain, and its increasing speed in recent years still kept higher than the average of all the country.