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Database: 189760 (18 Oct 2025)
JJG 188-2017
Chinese Standard: 'JJG 188-2017'
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JJG 188-2017
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JJG 188-2017
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JJG 188-2017
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unprotected-true-PDFs:
JJG 188-2017
GB/T 3222.2-2022
GB/T 3222.1-2022