Respiratory mask:
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Measure pressure, Electronic sphygmomanometer
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Blood analyzer
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Hospital, water filtration system
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Make incisions, Surgery
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Hospital, people’s voices, hallway
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Fluoroscopy
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Dentist Suction Tube
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Blood transfusion apparatus
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Sphygmomanometer, measure pressure
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Couch driven patient
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Laboratory, instrument noise
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Dentist rinsing the mouth with water
★★★★★