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白(bai)剛(gang)玉、高純白(bai)剛(gang)玉、低(di)鈉白(bai)剛(gang)玉、研磨(mo)耐(nai)磨(mo)砂、棕剛(gang)玉、碳化硅、多品(pin)種氧化鋁等系(xi)列(lie)產品(pin)
