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1、
Abomasal ulceration was found in 224 ( 79.4 % ) of 282 slaughtered beef cattles. The morbidity is high.
本文应用眼观和病理组织学方法,对282头商品肉用牛皱胃检测, 证实胃溃疡病存在,发病率高,达 79.4%.
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