gas helium
gas helium, Total:3 items.
The international standard classification for "gas helium" includes: Gases for industrial application .
The Chinese standard classification for "gas helium" includes: Industrial gas and chemical gas .
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB/T 16943-1997 Gases for electronic industry--Helium
- GB/T 16943-2009 Gas for electronic industry—Helium
Professional Standard - Chemical Industry
- HG/T 4985-2016 Mixed gas for welding. Helium in argon
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