Is the steam let go to regulate over pressure of the boiler before the pop off valve goes off? |
Date:
11/13/2019 |
Location:
Prescott, AR Map ![Show Prescott on a rail map](/images/map_us.gif) |
Views:
168 |
Collection Of:
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G Gerard |
Locomotives: |
Author: G Gerard
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![UP 4014](http://s3.amazonaws.com/rrpa_photos/133936/5330bb.jpg) |
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This picture is part of album: UP 4014 chase in Ark & OK |