Dung urinary leak into the ground, make no pollution or less polluted feed to keep cages and feed the clean sanitation.
粪尿漏到地面，使之不污染或者少污染饲料，以保持笼舍和饲料的清洁卫生。
Dung urinary leak into the ground, make no pollution or less polluted feed to keep cages and feed the clean sanitation.
粪尿漏到地面，使之不污染或者少污染饲料，以保持笼舍和饲料的清洁卫生。
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