The content of Cu in serum and hoof horniness of normal milk cows was lower than hoof disease milk Cows, but the content of Zn in serum of normal higher than of hoof disease Cows.
正常牛蹄角质和血清中铜含量低于病牛，而正常牛蹄角质和血清中锌含量高于病牛。
The content of Cu in serum and hoof horniness of normal milk cows was lower than hoof disease milk Cows, but the content of Zn in serum of normal higher than of hoof disease Cows.
正常牛蹄角质和血清中铜含量低于病牛，而正常牛蹄角质和血清中锌含量高于病牛。
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