| http://www.w3.org/ns/prov#value | - The device may be assembled in a suitable jig or fixture, the struts 20 being passed through body member 10 and received in the slots 23,26, respectively, of the upper and lower plates, and interlocking with said plates and with the body member 10; the latter, as above noted, is preferably of cardboard or other material softer than the struts.
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