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Re: VIDEO: R46s Operating on the G and N Lines

Posted by AlM on Sun Dec 8 08:29:37 2019, in response to Re: VIDEO: R46s Operating on the G and N Lines, posted by Fisk Ave Jim on Sat Dec 7 19:55:11 2019.

What kind of irreparable damage does passage of trains do to tunnels over time?

It seems hard to imagine something that causes damage over 150 or 200 years, but not over 100 years.

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