Air is bleeding through a hose:
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Air compressor operation
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Compressor discharges air, Construction
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Balloon descent
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Helium balloon
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Cut through the air with a gas burner
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Inflating a mattress
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Suction action of air
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A stream of air breaks out of a metal pipe
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Air is let through the regulator
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Fighting the fire with blacksmith furs
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Balloon inflating
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Air flow
★★★★★