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Plastics - Phenol-formaldehyde mouldings - Determination of free ammonia and ammonium compounds - Colorimetric comparison method (ISO 120:1977) 塑料.酚醛模塑件.游离氨和铵化合物的测定;比色比较法(ISO 120-1977);德文版EN ISO 120:1998
发布日期: 1998-10-01
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发布单位或类别: 德国-德国标准化学会
关联关系
研制信息
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