同义词
1)pig-on-litter system,木糠床养猪法2)litter bedding method,木糠床饲养法3)biological fermentation bed pig farming technology,发酵床养猪技术4)outdoor pig keeping system,户外养猪法5)the natural pig-raising method,自然养猪法6)technology of raising pig on biological fermentation bed,生物发酵床养猪技术
