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[GB/T 22727.1-2008] 通信产品有害物质安全限值及测试方法 第1部分：电信终端产品[现行]
发布时间：2008-12-30
实施时间：2009-08-01
GB/T 22727的本部分规定了电信终端产品中含有的铅（Pb）、汞（Hg）、镉（Cd）、六价铬［C..
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[GB/T 12990-1991] 水质 微型生物群落监测 PFU法[现行]
发布时间：1991-08-20
实施时间：1992-04-01
本标准的野外监测适用于淡水水体，包括湖泊、水库、池塘、大江、河流、溪流。本标准的室内毒性试验适用于工..
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