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gei zhu da zhen de ji qiao
Author(s): 
Pages: 42-43
Year: Issue:  11
Journal: Liaoning Journal of Animal Husbandry and Veterinar

Abstract: <正>当你面对龙精虎猛、东奔西跑或者老弱病残的猪时,是怎样给猪打针的呢?笔者从对注射器的结构和使用原则分析入手,在了解猪的性情
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