Air pressure:
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Balloon inflating
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Wind tunnel ventilation
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Air pressure
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Fighting the fire with blacksmith furs
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Construction, compressor discharges air
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The work of oxygen equipment, the release of
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Small compressor blowing air
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Air is bleeding through a hose
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Mask breathing
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Truck Air Brakes
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Soccer ball
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Blower, air broom
★★★★★