Export coefficient method is suitable for the region where there is no enough observation data. Export coefficient is the key to improve the accuracy of estimation.
输出系数方法适用于资料比较缺乏的地区，输出系数的确定是提高估算精度的关键。
Export coefficient method is suitable for the region where there is no enough observation data. Export coefficient is the key to improve the accuracy of estimation.
输出系数方法适用于资料比较缺乏的地区，输出系数的确定是提高估算精度的关键。
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