effective helix angle

例句：

1. 1. The design of the new carhas a very effective helix angle.
   这款新车的设计具有非常有效的螺旋角。
2. 2. Thescientist used an instrument to measure the effectivehelix angle of the beam.
   科学家使用一种仪器来测量光束的有效螺旋角。
3. 3.The engineer calculated the effective helix anglefor the screw to ensure it was aligned correctly.
   工程师计算了螺丝的有效螺旋角，以确保其正确对齐。