| 单词 | oxygen concentrators |
| 释义 | oxygen concentratorsoxygen concentratorsPortable devices containing molecular sieves of silica and alumina through which air is forced. The sieves selectively adsorb nitrogen and carbon dioxide from the air to give an output of 95% of medically acceptable oxygen and 5% of the inert gas argon. These concentrators deliver oxygen to patients in their own homes at a small fraction of the cost of oxygen in cylinders. |
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