The fan for keeping ventilation of the pig barn.
猪舍中保持通风的风扇。
As a new and environmental pig-keeping technology, the method of biological fermentation bed was widely paid attention to domestically and abroad.
结合国内外的应用状况，笔者对生物发酵床养猪的技术原理及优缺点进行了探讨。
As a new and environmental pig-keeping technology, the method of biological fermentation bed was widely paid attention to domestically and abroad.
结合国内外的应用状况，笔者对生物发酵床养猪的技术原理及优缺点进行了探讨。
应用推荐