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There were also
gas detection systems So that if too much gas
accumulated in one location, It could easily shut off
certain sections of the tunnel To exhaust those areas
gas detection systems So that if too much gas
accumulated in one location, It could easily shut off
certain sections of the tunnel To exhaust those areas
Full Transcript
00:00:01.000 --> 00:00:03.534
There were also
gas detection systems
00:00:03.536 --> 00:00:07.305
So that if too much gas
accumulated in one location,
00:00:07.307 --> 00:00:10.241
It could easily shut off
certain sections of the tunnel
00:00:10.243 --> 00:00:12.577
To exhaust those areas.
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Movie Summary
An examination of hidden structures built by the Nazis, from tunnels to towers, artillery sites, resistance nests, and communication centres.