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Database: 189760 (12 Jul 2025)
GB/T 21447-2018
Chinese Standard: 'GB/T 21447-2018'
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GB/T 21447-2018
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Specifications for steel pipeline external corrosion control
GB/T 21447-2018
Valid
GB/T 21447-2018
SIMILAR
unprotected-true-PDFs:
GB/T 21447-2018
GB/T 23258-2020
GB/T 9109.5-2017
GB/T 18604-2014
GB/T 9711-2011
GB/T 21391-2008