Ground Plane to Master-Section!! TS Precedents!!

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Main precedent for TS,  flip from horizontal ground plane to sectional ground condition!

http://www.bbc.co.uk/news/science-environment-18684075

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One Response to Ground Plane to Master-Section!! TS Precedents!!

  1. Natasha Sandmeier says:

    great precedent!! I forgot about this crazy thing.