Cut through the air with a gas burner:
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Air compressor operation
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Air is blown through a glass tube
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Suction action of air
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Construction, compressor discharges air
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The work of oxygen equipment, the release of
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Balloon descent
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Air pressure
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Small compressor blowing air
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Soccer ball
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Wind tunnel ventilation
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Oxygen balloon
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Air is let through the regulator
★★★★★