以下为句子列表：
英文: Abstract: The preparation of cuprous chloride from etching waste liquor of cupric chloride and crude copper powder was studied.The result showed that this method had many advantages,including simple process,easy operation and good quality of product,there
中文: 文摘:以氯化铜蚀刻液废液、粗铜粉等为原料，在常温下反应制备氯化亚铜，工艺简单，操作简便，产品质量好，具有显著的经济效益和环境效益。
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英文: By using chemical reduction method in aqueous solutions,the ultramicro copper powder with mean diameter about 50nm was prepared.
中文: 分别采用表面包银和磷化处理的方法，提高了铜粉的抗氧化性能，使５０ｎｍ铜超微粉末能稳定地存在于空气中，磷化处理后铜粉末的氧化温度高于２２０℃。
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