Steam:
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Air bleed, cylinder pressure, Air compressor
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Air release with a loud whistling creak,
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Fighting the fire with blacksmith furs
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Air flow
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Rope torsion
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Small compressor blowing air
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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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Air is let through the regulator
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Helium balloon
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Oxygen balloon
★★★★★