NIR Posted February 26, 2021 Share Posted February 26, 2021 (edited) What was the purpose of the channel left along the ballast in the top photo. What was it called and when did the practice stop. Edited February 26, 2021 by NIR Quote Link to comment Share on other sites More sharing options...
0 Noel Posted February 26, 2021 Share Posted February 26, 2021 Drainange? Quote Link to comment Share on other sites More sharing options...
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NIR
What was the purpose of the channel left along the ballast in the top photo. What was it called and when did the practice stop.
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