ore-drawing grade 出矿品位
drawing cutoff grade 放矿截止品位
cut off grade ore drawing 截止品位放矿
cutoff grade of ore drawing 截止放矿品位
extreme cut-off grade ore drawing 极限截止品位放矿
cut-off grade of ore drawing 放矿截止品位
cut-off grade for ore drawing 放矿截止品位
But by grade school, he was already showing promise in drawing.
CNN: 'Self Portrait'
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