Studyies on Critical Technologies in Embryo-Transfer of Ber Goats
li yubing1 ; xiao xishan1 ; xie fuqiang2 ; hou yinxu1 ; zhao jinxiang3; cheng peng1; wang wenli1; qi junzhe1; qiao lidong 1 ; yan kaihang4 (1.beijing agricultural vocation college; beijing 102442; china; 2. china agriculture university; beijing 100094 ; china; 3. pinggu district service center for livestock breeder; beijing 101206; china; 4. lvdu goat breeding limited company; beijing 101206; china)
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