primary line constants
... that the primary line constants describe characteristics of copper transmission lines?
... that the <b id="mwAUo"><a href="./Primary_line_constants" id="mwAUs" rel="mw:WikiLink" title="Primary line constants">primary line constants</a></b> describe characteristics of <a href="./Copper" id="mwAUw" rel="mw:WikiLink" title="Copper">copper</a> <a href="./Transmission_line" id="mwAU0" rel="mw:WikiLink" title="Transmission line">transmission lines</a>?