Electronic sphygmomanometer, measure pressure:
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Cardiomonitor, ventilator
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Water filtration system, Hospital
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Dentist brushing teeth
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An empty cart for the sick
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Hydraulic hospital bed
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Dentist rinsing the mouth with water
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Blood transfusion apparatus
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Pencil movement, EEG
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Laboratory, instrument noise
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Surgical suction device
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Measure pressure, Sphygmomanometer
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People’s voices, Hospital, hallway
★★★★★