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Hyper tanks and gases
We used BOC for our stuff in the good ol' days. Now, that brings back memories......
The ASV had a very active Astrophotography section back in the 80' early 90's ( I was Director) and many of the members had and used Hyper tanks.
Unfortunately over the years mine has disappeared, but there still may be one or two available from the old guard in the ASV. Steve Pattie's name comes to mind.
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