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YY/T 1897-2023 English PDF (YY/T1897-2023)
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YZ/T 0173-2020 English PDF (YZ/T0173-2020)
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ZZ060 (GB/T 1804-2000_English etc. 4x PDFs. See P250910-164055)
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ZZ062 (GB/T 18487.1-2023_ENGLISH etc. 3x PDFs. See P250911-170333)
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ZZ064 (GB/T 7560-2001_English)
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ZZ066 (GB 18384-2020_CN)
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