螺旋槽沟齿铣刀
spiral flute twin teeth milling cutter
W形螺旋槽管
W type spirally fluted tube
长螺旋旋喷水泥土桩
long auger rotary-jet mixing soil-cement pile
单列双向螺旋槽
Single-row Bidirectional Spiral Grooves
非标螺旋槽刀具
spiral groove of non-standard cutting tool
钢质螺旋槽管
steel spirally fluted tube
环面螺旋旋转变换
Torus screw rotation transformation
回转曲面螺旋槽
screw flute with surface of revolution
螺旋槽波导
Helically grooved waveguide
螺旋槽粗加工铰刀
spiral-fluted roughing reamer