该中心表示，对使用这种饲料的四个养鱼场进行的检测显示，所有鱼类样本全部合格。
But the center said tests of fish from four farms that used the feed turned up satisfactory levels.
企业自愿申请，认证机构对饲料和饲料添加剂产品及其生产过程按照有关标准或者技术规范要求进行合格评定。
Enterprises make applications on a voluntary basis. Certification bodies assess feeds, feed additives and their production process in accordance with relevant standards and technical rules.
而其中不合格的5批次产品，2批次为牛羊用浓缩饲料，3批次为牛用浓缩饲料。
In the 5 batches unqualified products, 2 batches are concentrated feed for cattle and sheep, 3 batches are concentrated feed only for cattle;
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