短語詞組短語helical curve cutter 螺旋刃刀具helical curve cutters 螺旋刃刀具equal changeable column helical curve 均變圓柱螺旋線concrete -Mixer drum helical curve 攪拌罐螺旋線non -equiangular logarithm helical curve 非等角對數(shù)螺旋線helical coil steam generator curve 螺旋曲線 返回 helical curve