an></span><span class="sig-name descname"><span class="pre">qiinv</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">spec</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">yk</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">wt</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">vn</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">lamb</span></span></em>, <e