| 摘要 |
The tracks (1) for the electric train system are covered by a semicircular section portal (4). The overhead current supply conductors (5) are supported on insulators (8, 9) fixed (6, 7) to the structure. The horizontal side staves (11) are fixed to extra curved supports (12, 13) at intervals. The staves provide sound insulation between the track and the immediate environment.
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