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In this experiment, peanut hull ashed at 500 ℃ for 30 minutes.
本实验中, 将花生壳置于方形高温炉中,在500℃?烧30分钟,制成花生壳灰.
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The residue was ashed at 450 ℃ for 2 h, and its mass was taken accurately.
将在100℃烘干的残渣于450℃灰化2h，冷至室温准确称得其质量。
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