The work of oxygen equipment, the release of oxygen:
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Air is let through the regulator
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Rope torsion
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Steam
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Cut through the air with a gas burner
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Construction, compressor discharges air
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A stream of air breaks out of a metal pipe
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Air is bleeding through a hose
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Air flow
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Soccer ball
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Air release with a loud whistling creak,
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The release of, The work of oxygen equipment
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Suction action of air
★★★★★