仔猪大肠埃希氏菌腹泻K88-LTB双价基因工程活疫苗-15℃保存期试验
자저대장애희씨균복사K88-LTB쌍개기인공정활역묘-15℃보존기시험
The Test on Preservative Period in -15 ℃ of Gene Recombinant Living Vaccine of Escherichia Coli(K88 and LTB) for Newborn Piglets
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