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PGF Gas - Using TikZ circuits to draw gas networks.
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(c) Robert Schwarz, 2011, <[email protected]>

This package defines four new symbols for common elements in natural
gas networks:

 - Compressors    (cs)
 - Valves         (va)
 - Control valves (cv)
 - Resistors      (re)

See example.tex for an example of the usage.

Requires pgf with circuits library, e.g., version 2.10