Referenziert von|
| US4085808 | 28. Jan. 1977 | 25. Apr. 1978 | | Self-driving and self-locking device for traversing channels and elongated structures | | US4170383 | 17. Jan. 1978 | 9. Okt. 1979 | Bouygues | Tunneling machines and other cutting machines | | US4226477 | 10. Jan. 1979 | 7. Okt. 1980 | | Device for removing the earth generated by tunneling |
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