3. An extremely poisonous white compound, KCN, used in the extraction of gold and silver from ores, electroplating, and photography, and as a fumigant and insecticide.
剧毒白色化合物,KCN,用于从矿石中提炼金银的过程中、照相中以及作为熏蒸剂和杀虫剂。
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4. An extremely poisonous white compound, KCN, used in the extraction of gold and silver from ores, electroplating, and photography, and as a fumigant and insecticide.