同时，这一方法可避免覆盖层生长太厚的开裂问题，结合侧向外延生长可以大大提高外延片的利用率。
At the same time, the method can avoid a craze problem caused by a thick covering layer, and increase extension plate utilization greatly combined with side extension growth.
方法采用细胞毒性试验中的琼脂覆盖法，通过直接放置样品和放置样品浸提液载片两种方法，对三批不同生产日期的奥美定进行测试研究。
Methods Using NCTC 929 clone and agar diffusion method, the three products of different producing dates were evaluated by both methods of laying specimens directly and only laying its extraction.
方法采用细胞毒性试验中的琼脂覆盖法，通过直接放置样品和放置样品浸提液载片两种方法，对三批不同生产日期的奥美定进行测试研究。
Methods Using NCTC 929 clone and agar diffusion method, the three products of different producing dates were evaluated by both methods of laying specimens directly and only laying its extraction.
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