| http://www.w3.org/ns/prov#value | - This may be done either by enclosing the assembly 27 of FIG. 3 within a cathode-ray .Iaddend.tube and directing an electron beam in circular scan successively to points such as 22 and 23; or, alternatively, it is feasible to connect wires from all points such as 22 and 23 to an electronic circuit assembly containing an electrical switching system so that signals can successively be transmitted to
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