稀释液中添加不同浓度的维生素B12对牛细管冷冻精液精子形态的影响
희석액중첨가불동농도적유생소B12대우세관냉동정액정자형태적영향
The Effect of Adding Vitamin B12 in Sperm Diluter on Quality of Bull's Straw Frozen Sperm
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