The trademark class of industrial gases is 0101

0101 Industrial gas, elemental substance

(1) Ammonia* 010061, Anhydrous ammonia 010066, Argon 010082, Nitrogen 010092, Nitric oxide 010093, Nitrous oxide 010093, Chlorine 010183 , Fluorine 010302, Welding shielding gas 010326, Industrial solid gas 010328, Dry ice (carbon dioxide) 010333, Helium 010344, Hydrogen 010359, Krypton 010372, Neon 010401, Oxygen 010413, Radon 010457, Xenon 010551

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