An apparatus for moving a gas-tight closing of a horizontally movable door leaf for Schutzraumabschluesse

@inproceedings{Seiz1963AnAF,
  title={An apparatus for moving a gas-tight closing of a horizontally movable door leaf for Schutzraumabschluesse},
  author={Dipl-Ing Rudolf Seiz and Heinz Eickhoff and Wolfgang Scheer},
  year={1963}
}