| http://www.w3.org/ns/prov#value | - FIG. 26 is an electrical circuit of an alternate embodiment according to the present invention, in which AC power with the phase being reversed each other as illustrated by the wave forms over the feeder plates 11c, 11d, 11b in FIG. 26 is supplied from the power supply 10' to the feeder plates 11a, 11c, 11d, 11b by the on-off control of a switching elements 37, 38, 39 through a ring counter 36.
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