A stream of air breaks out of a metal pipe:
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Rope torsion
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A stream of air breaks out of a metal pipe
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Balloon inflating
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Fighting the fire with blacksmith furs
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Suction action of air
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Air pressure
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The release of, The work of oxygen equipment
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Air compressor operation
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Soccer ball
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Balloon descent
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Cylinder pressure, air bleed, Air compressor
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Wind tunnel ventilation
★★★★★
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