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Air


 

Air is a name for the mixture of gases present in the Earth's atmosphere.

Related Topics:
Gas - Earth's atmosphere

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Compressed air is often used in scuba diving as a shallow water breathing gas and to inflate buoyancy devices. Compressed air is also used as the means of transmission of energy to pneumatic tools.

Related Topics:
Scuba diving - Breathing gas - Buoyancy - Pneumatic tools

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