| http://www.w3.org/ns/prov#value | - FIGS. 25 and 26 fragmentarily illustrate a very slight modification of the invention and parts which are functionally and/or structurally similar are designated by similar reference numerals, followed by the letter m, however. -In this modification, the major change is the fact that the switch 40m is arranged to electrically energize the magnet 26m which, in this case, is an electromagnet having a
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