Bob Wang's Shaarli
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推荐性国家标准
国家标准全文公开
国标
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国家标准
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GB
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强制性国家标准
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推荐性国家标准
February 27, 2021 at 9:05:34 PM GMT+8 * ·
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http://openstd.samr.gov.cn/bzgk/gb/
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