helical CT螺旋式计算机体层造影helicaladj.螺旋状的helical entry cyclone螺旋进入式旋风分离器helical carbon fibers螺旋炭纤维helical intake-port螺旋进气道helical drill-point螺旋面钻尖helical gear modeling斜齿轮建模helical xenonarc lamp螺旋形氙电弧灯helical configuration螺旋构型helical spling broach螺旋花键拉刀Helical array antenna螺旋阵列天线helical-fin section螺翅