or breathing becomes difficult
If the respirator becomes damaged, soiled, or breathing becomes difficult, replace the respirator.
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or breathing becomes difficult
或者呼吸变得困难
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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If the respirator becomes damaged, soiled, or breathing becomes difficult, replace the respirator.
当呼吸防护口罩损坏、被玷污，或感觉呼吸困难时，请更换呼吸防护口罩。
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