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GB/T 4844-2011 English PDF (GBT4844-2011)

GB/T 4844-2011 English PDF (GBT4844-2011)

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GB/T 4844-2011: Pure helium, high pure helium and ultra-pure helium
This Standard specifies the specifications, inspection rules, test methods, and product packaging, marking, storage and transportation and safety warnings of gaseous helium and liquid helium.

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