| http://www.w3.org/ns/prov#value | - Center portions 114 a and 114 b and side portions 115 a and 115 b are preferably manufactured out of conductive material (e.g. a suitable metal such as aluminum, copper, brass or another metal plated with gold or silver, or chemical coated surface) to establish a waveguide transmission line with no crosstalk between waveguide passages.
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