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Database: 189760 (25 Oct 2025)
GB/T 31447-2015
Chinese Standard: 'GB/T 31447-2015'
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GB/T 31447-2015
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Days<=3
Pre-galvanized highway guardrail
GB/T 31447-2015
Valid
GB/T 31447-2015
SIMILAR
unprotected-true-PDFs:
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GB 38900-2020
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