Seven years ago his father, Robert, produced a diamond in a high-pressure chamber of carbon gas and dropped it into an acid solution to clean it off.
七年前他的父亲罗伯特在一间高压碳气室中制造了一颗钻石，把它放入酸性溶液中清洗干净。
2
The achievements of her research in acid dyes with highcarbon alkyl group, reactive dyes, reactive disperse dyes and silk dyes were mainly reviewed.
在研究领域中着重介绍她在含长碳链烷基酸性染料、活性染料、活性分散染料及丝绸染料方面的成就。
3
High reinforced white carbon black is prepared by using phosphate fertilizer's by-product fluosilicic acid as raw material and ammonia water as ammonia analytical agent.