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Cartridges and canisters of air-purifying respirators : ウィキペディア英語版 | Cartridges and canisters of air-purifying respirators
Employees working in a polluted atmosphere, use respirators for health preservation. If the air in the workplace is polluted with noxious gases, but contains a lot of oxygen〔(>19.5% in US; >18% in RF)〕 they often use air-purifying respirators (APR). These respirators provide employees breathable air due to the cleaning of contaminated ambient air with gas canisters or cartridges. ''(Сanisters and cartridges are named "cartridges" in this text late - for brevity).'' There are cartridges of different types, and they must be chosen correctly, and replaced in time. == The principles of purification of polluted air in APR ==
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