The work of oxygen equipment, the release of oxygen:
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Construction, compressor discharges air
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Mask breathing
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Suction action of air
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Helium balloon
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Small compressor blowing air
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Air compressor, cylinder pressure, air bleed
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Air compressor operation
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Cut through the air with a gas burner
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Inflating a mattress
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Rope torsion
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Soccer ball
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Fighting the fire with blacksmith furs
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