Re: Camo dudes

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Message posted by Art Bell (Member since 03/16/2022) on November 28, 2022 at 10:42:19 PST:

The theory is that the rock is 'melted' and then pressed into the interior of the tunnel itself, effectively 'paving' it and leaving a smooth surface all around.

I'm not an engineer, but there's a good amount of articles out there on this kinda thing, like this one from 50 years ago:

https://www.nytimes.com/1971/12/25/archives/thermal-boring-device-melts-away-granite.html

In Reply to: Re: Camo dudes posted by The Doctor on November 27, 2022 at 18:34:27 PST:

Replies:

Re: Camo dudes The Doctor 11/29/2022, 12:41:23 PST (3)
- Re: Camo dudes Art Bell 11/30/2022, 7:56:19 PST (2)
  - Re: Camo dudes Mark 11/30/2022, 16:37:48 PST (1)
    - Re: Camo dudes The Doctor 12/01/2022, 11:44:29 PST (0)

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