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Database: 189759 (19 Oct 2025)
GB/T 33668-2017
Chinese Standard: 'GB/T 33668-2017'
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GB/T 33668-2017
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Days<=4
Code for safety evacuation of metro
GB/T 33668-2017
Valid
GB/T 33668-2017
SIMILAR
unprotected-true-PDFs:
GB/T 37521.3-2019
GB/T 37521.1-2019
GB/T 37470-2019
GB/T 37230-2018
GB 13954-2009