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简介：办公室打印机中的硒鼓在用完后被回收，不良商家将回收后的硒鼓重新灌上劣质碳粉再回销市场，但劣质碳粉对人的身体很有害处，对打印机也是损害较大。本期节目讲述关于凹印机中硒鼓的问题。收起
办公室里的“黑匣子” 《走近科学》20110828
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