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本文对国内５个铀矿山１９８８～１９９３年间２０６５７个平衡因子Ｆ值进行了统计分析。结果表明，平衡因子Ｆ按各矿实测样品数加权的总平均值为０．３３，文中同时给出平衡因子Ｆ值每年逐月的变化
In this paper, statistical analysis of 20657 F value of five domestic uranium mines from 1988 to 1993 was carried out. The results showed that the total average of the balance factor F weighted by the number of samples measured at each mine was 0.33, and the monthly variation of the balance factor F value was also given