Results of author's experiments show that this grade error tends to increase with the decrease of sampling volume and the increase of the boulder content as well as sorting coefficient of the placer.
笔者所做的砂金取样规格试验表明，砂金品位误差随着取样体积减小而增大。
Results of author's experiments show that this grade error tends to increase with the decrease of sampling volume and the increase of the boulder content as well as sorting coefficient of the placer.
笔者所做的砂金取样规格试验表明，砂金品位误差随着取样体积减小而增大。
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