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Amazon.com: Endure Adjustable Adult Oxygen Venturi Mask with Accessories, Large Size (2) : Health & Household
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🅰️.𝙰𝚍𝚎𝚗𝚒🫁 on Twitter: "Venturi mask system - can provide 24% - 60% O2 ( via flow rate of 2-15 L/min O2) - ideal as delivers a more precise level of O2 -
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