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140 year old technology!

https://www.modelrailwayforum.com/viewtopic.php?t=4480

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140 year old technology!

Posted: Mon Mar 07, 2022 5:28 pm
by Mr Bones
After 140 years, this old technology still keeps trains safe.

You Tube - Tom Scott

Re: 140 year old technology!

Posted: Wed Mar 09, 2022 9:47 pm
by Mountain Goat
Interesting.
All times are UTC
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