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The high-altitude railway linking Golmud in China's Qinghai province to Lhasa in Tibet opened to the public earlier this month with oxygen-enriched passenger compartments. Air Products & Chemicals supplied its Prism membranes for use in generators that separate oxygen to enrich the thin air and prevent breathing difficulties. The Qinghai-Tibet Railway, intended to open China's remote western region, takes travelers on a 700-mile trip at altitudes that exceed 13,000 feet above sea level for much of the journey.
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