Carbon dioxide was introduced into the wheat bulk stored in a brick silo through a duct system and was recirculated for even distribution till CO2 concentration to 70 96 in wheat bulk.

• 二氧化碳被导入一管道系统并使其在砖筒仓的粮堆内逐渐均匀分布，直到其在粮堆中的浓度达70%25以上。