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铸造硅砂:规格(10-20目,20-40目,30-50目,40-70目,50-100目,70-140目,种类有水洗砂、擦洗砂、精选砂,含硅量≥98%)

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铸造硅砂:规格(10-20目,20-40目,30-50目,40-70目,50-100目,70-140目,种类有水洗砂、擦洗砂、精选砂,含硅量≥98%)










