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Standards?

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Are there standards for composition of lean air? Is the major component necessarily nitrogen? If not, what else, If so, it should be specified. Lean air would be a by-product of oxygen enriched nitrox production by pressure swing adsorption and membrane gas separation. · · · Peter Southwood (talk): 11:05, 1 January 2024 (UTC)[reply]

Breathing gas?

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Is lean air classified as a breathing gas? What are the specifications? · · · Peter Southwood (talk): 11:13, 1 January 2024 (UTC)[reply]