Construction, compressor discharges air:
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Suction action of air
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Balloon descent
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Truck Air Brakes
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Rope torsion
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Air is bleeding through a hose
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Air is blown through a glass tube
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Balloon inflating
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The release of, The work of oxygen equipment
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Air compressor operation
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Air compressor, cylinder pressure, air bleed
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Fighting the fire with blacksmith furs
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Air flow
★★★★★