?高级的高岭土亦称瓷土
高岭土(Kaolin) 高级的高岭土亦称瓷土(china clays)，几乎纯由高岭石群组成，是最昂 贵的粘土，可作纸张之表层和填料及橡胶、耐火和陶瓷工业用。
英国瓷土有限公司
The china clay industry in Cornwall was started nearly 300 years ago by English China Clays, which was taken over by Imerys in 1999.
BBC: Imerys china clay in Cornwall announces job losses
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