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Make a hospital bed
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Instrument noise, Laboratory
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Sphygmomanometer, measure pressure
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Blood transfusion apparatus
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Blood analyzer
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Ventilator, Cardiomonitor
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Rinsing the mouth with water,, Dentist
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Suction, doctors voices, operation, Hospital
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Surgical suction device
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Dentist brushing teeth
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An empty cart for the sick
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Pencil movement, EEG
★★★★★