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Boiler room - Capital Adventures — LiveJournal
November 23rd, 2010
09:51 pm
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Boiler room

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From:siliconshaman
Date:November 23rd, 2010 01:34 pm (UTC)
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I think those are valve certification and identification tags... used to both ensure the valve is in the safe position during repairs and identify what the valve is, as you surmised, in the dark.

and yeah, my inner engineer is very happy with this series of photo's.
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