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wei sheng su jia ge ying xiang yin su ji qu shi fen xi
Author(s): 
Pages: 8-10
Year: Issue:  6
Journal: Liaoning Journal of Animal Husbandry and Veterinar

Abstract: <正>从20世纪30年代开始,国外对维生素的结构及其合成方法进行研究,大规模工业化生产技术20世纪70年代以后才逐渐成熟。少数几家跨国公司依靠技术优势和雄厚的资金实力,在国际
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