2006-10-13 10:17:02 · 4 answers · asked by Jof 2 in Travel ➔ United Kingdom ➔ Other - United Kingdom
There are air compressors for the doors and vacuum pumps for the brakes. They have to keep the pressure up (or down) as necessary
2006-10-13 11:28:21 · answer #1 · answered by Philip W 7 · 2⤊ 0⤋
When there are no trains in front of you but you still hear this is an echo.
Do you know what that is? Its when solid walls all around you bounce sound back and forth its because there are litle to no opennings in the tube stations other than the tunnels and the exits.
[I don't mean to be condescending]
2006-10-13 10:20:34 · answer #2 · answered by Anonymous · 0⤊ 1⤋
The Tube does not move - but the trains do!
2006-10-17 04:06:20 · answer #3 · answered by Anonymous · 0⤊ 0⤋
it a mechanical thing. Must keep working even when not moving.
2006-10-13 18:04:01 · answer #4 · answered by Anonymous · 0⤊ 1⤋