invex不变凸INVabbr.发明者(=Inventor)abbr.反相器(=Inverter)abbr.体外授精(=in vitro fertilization)involutional psychosis更年期精神病involute entry cyclone渐开线进入式旋风分离器involutive correlation对合的对射变换,对合对射Involute interpolation渐开线插补invigorative absurdity激励悖论involutional paychosis经绝期精神病invaJidation mechanism失效机理invaginatio epibolicus外包式内陷involute spline broach渐开线花键拉刀Involute tooth profile渐开线齿廓