helix angle
...旋齿轴;螺旋升角;坯料形状;螺旋痕[gap=1658]Key words: cross wedge rolling; trapezoidal helical tooth shaft; helix angle; blank shape; helical mark...
[机 航] lead angle
... 钻头长度bit length 螺旋升角lead angle 螺旋工作面screw surface of bit ...
Spiral rise angle
螺旋升角
spiral lead angle
螺旋升角