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Air (Rbj)

Scope Note
The mixture of gases forming the earth's enveloping atmosphere
Definition
The mixture of gases forming the earth's enveloping atmosphere. (Source: TRT SN)
Broader Term
Classes of materials (Rb)
Narrower Terms
Compressed air (Rbjc)
Related Terms (Hierarchical)
States of matter (Rbb)
Chemicals (Rbc)
Water (Rbd)
Natural earth crust materials (Rbe)
Fuels (Rbf)
Building materials (Rbm)