Talk:Dihedral synchro-helix actuation doors

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 * Dihedral synchro-helix actuation doors - US Patent - 1.png
 * Dihedral synchro-helix actuation doors - US Patent - 2.png
 * Dihedral synchro-helix actuation doors - US Patent - 3.png
 * Dihedral synchro-helix actuation doors - US Patent - 4.png