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[GB 5205-1985] 化肥催化剂产品分类和命名[已作废]
发布时间：1986-03-01
实施时间：1986-03-01
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[GB/T 3597-1983] 肥料中硝态氮含量的测定 氮试剂重量法[已作废]
发布时间：1983-04-11
实施时间：1984-02-01
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[GB 3598-1983] 肥料中尿素态氮含量的测定 尿素酶法[已作废]
发布时间：1983-04-11
实施时间：1984-02-01
本标准适用于尿素酶法测定尿素或仅含有氮的肥料中尿素态氮含量。该法也适用于相应的工业产品。
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