Semen preservation includes liquid preservation (normal temperature preservation and low temperature preservation) and freezing preservation.
精液保存包括精液的液态保存(常温保存和低温保存)和冷冻保存。
·2,447,543篇论文数据，部分数据来源于NoteExpress
Meantime, the concrete measures were elicited for bull selection, making and preservation of frozen semen, mating methods and frozen embryo pool establishment etc.
同时，从种牛选择，冻精制作与保存、选配方法、建立冷冻胚胎库等方面提出了具体技术措施。
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