| http://www.w3.org/ns/prov#value | - Thus, when any electrode pair, such as electrodes 41 and 42, is activated, and electrode pairs 43-44 and 45-46 are deactivated by closure of switch 21 and opening of switches 22 and 23, respectively, switch 71 is open and switches 72 and 73 are closed, thus electrically floating electrodes 43, 44, 45 and 46, Because connecting lines 53,54, 55 and 56 are odd multiples of 1/4 wave length however, el
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