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Database: 189760 (18 Oct 2025)
HG 3550-1990
Chinese Standard: 'HG 3550-1990'
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HG 3550-1990
English
199
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Days<=2
(A110 series ammonia synthesis catalyst)
HG 3550-1990
Obsolete
HG 3550-1990
SIMILAR
unprotected-true-PDFs:
GB/T 18881-2017
GB/T 31584-2015
GB/T 21510-2024