| http://www.w3.org/ns/prov#value | - If you are looking to try building this, the flyer is a good place to start -- the diagram of the trough is for a 2 diameter collector (the standard size for vacuum collection tubes), and is a 1 to 1 representation -- so if you print the flyer on the appropriate printer, you can just cut out the shape, trace it onto a piece of wood and cut your own.
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