Methods Linking-cask way and standard way were used for examining the killing effect of killg cockroach chalk,The mortality of 24h,48h and 72h were used for comparing two kind of way.
英
美
释义
方法采用连接筒法和国标法,通过观察24、48和72小时杀蟑螂笔对德国小蠊的死亡率比较两种方法的差别。
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