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emergency regulator /ɪmˈɜːdʒənsi ˈɹɛɡjʊlˌeɪtə/ n

中文：备用呼吸调节器

中文 · 备用呼吸调节器Español · regulador de emergenciaFrançais · détendeur de secours
Meaning：Regulator second stage that is connected by a hose to the regulator first stage; it is used to supply air to a diver in difficulty.
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Scuba diver

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