Gochtief Ag Vorm. Gebr. Helfmann

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Essen, DE

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Information Patent Grant
Movable form front for a tunnel-lining form
- Patent number 4,645,378
- Issue date Feb 24, 1987
- Gochtief Ag Vorm. Gebr. Helfmann
- Volker Hentschel
- E21 - EARTH DRILLING MINING