oxygen mask
Any of various flying insects of the suborder Symphyta whose ovipositor is long and often serrated and is used to cut into plants to lay eggs.
A plastic or rubber mask through which oxygen may be breathed from a storage tank.
Hectoring; swaggering. / Crushing; resounding.
plural of keypuncher
避難訓練中、指導者は酸素マスクを素早く快適に装着する方法を教えてくれました。
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DiQt
Free
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