| 摘要 |
The invention relates to a device for digging roads, tunnels or the like, said device comprising a boring head that can be rotationally driven about a rotational axis (D) and displaced in the digging direction. According to the invention, the boring head (100) comprises an inner part (1) which is driven about the rotational axis (D) and an outer part (6) which is also driven about the rotational axis (D), concentrically to the inner part (1). |
