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Gas check-up measures relative standard
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Medical oxygen (GB 8982-1998) is medical oxygen (pharmacopoeia 2005) is high pure oxygen (GB/T 14599-1993) is industrial oxygen (GB/T 3863-1995)
The electron is industrial oxygen (breath of GB/T 14604-1993) aviation uses oxygen (GB 8983-1998)

Industrial nitrogen (GB/T 3864-1996) purity nitrogen (GB/T 8979-1996)
Tall purity nitrogen (GB/T 8980-1996) electron is industrial nitrogen (GB/T 16944-1997)

Pure argon (GB/T 4842-1995) is high pure argon (GB/T 10624-1995)
The electron is industrial argon (GB/T 16945-1997)

Carbon dioxide of liquid of additive agent for food (zymotechnics) (GB 1917-1994)
Carbon dioxide of liquid of additive agent for food (limekiln law and synthetic ammonia law) (GB 10621-1989)
Industrial liquid carbon dioxide (GB/T 6052-1993)
Solder with carbon dioxide (HG/T 2537-1993)

Industrial hydrogen (GB/T 3634-1995) pure hydrogen, high pure hydrogen and exceed pure hydrogen (GB 10621-1989)
The electron is industrial hydrogen (GB/T 16942-1997)

Industrial helium (GB/T 4844.1-1995) pure helium (GB/T 4844.2-1995)
High pure helium (GB/T 4844.3-1995) the electron is industrial helium (GB/T 16943-1997)

Xenon (GB/T 5828-1995)

Krypton (GB/T 5829-1995)

Medical oxidation inferior nitrogen (HG 2685-1995) is medical oxidation inferior nitrogen (pharmacopoeia 2005)
The electron is industrial oxidation inferior nitrogen (GB/T 14600-1993)

The electron is industrial high pure ammonia (GB/T 14601-1993)

The electron is industrial chloridize hydrogen (GB/T 14602-1993)

The electron is industrial 3 fluorine change boron (GB/T 14603-1993)

The electron is industrial phosphine (GB/T 14851-1993)

The electron is industrial silicon alkyl (GB/T 15909-1995)

Pure neon (GB/T 17873-1999)

Pure firedamp (HG/T 17873-1999)

Solder cut uses propylene burning gas (HG/T 3661.1-1999)

Solder cut uses propane (HG/T 3661.2-1999)

-- news source: Beijing grand prosperous believes limited company of science and technology

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