| 摘要 |
1,231,728. Apparatus for excavating tunnels. GEWERKSCHAFT EISENHUTTE WESTFALIA. 6 Oct., 1969 [25 April, 1969], No. 48887/69. Heading E1F. Apparatus for -excavating tunnels comprises aconveyor 27, a carriage 5 movably mounted on the conveyor,. and a beam 4 mounted on the carriage for pivotal movement about vertical and horizontal axes 8, 7 and carrying a shovel 13. The conveyor is a scraper conveyor and is braced by a device 26. The beam 4 is hollow and it is displaceable in its longitudinal direction relative to the carriage 5 and is rotatable about its longitudinal axis. |
