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Institute for Drug Control laboratory use, is absolutely its own development, seeking both the variance of the number of bacteria, type simple, the result is correct, has been applied to actual projects. Greatly reduced the workload. Input format for the 7.52* 10 (5) 7.49* 10 (5 ) 6.82* 10 (5) that the 3 sets of data, () within that order of magnitude