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Os padrões do Ministério da Química são raramente atualizados; o hg20570 é um padrão de 1995

2016-07-20View Original

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Alguém percebeu quais padrões podem substituir o 20570?
Reply #22016-10-27
Mesma pergunta: mais de 20 anos se passaram, por que os padrões ainda não foram atualizados?

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