| 摘要 |
The arrangement has first and second rails 30, 32 of a first track and first and second rails 34, 36 of a second track. One rail of each track is positioned between the rails of the other track. This design provides one rail pair staggered with respect to the other, so that two different track designs can be provided, but over substantially the same area of ground. Each rail is held in a shell 26 embedded in a channel in a bed or slab of concrete 24. |
