Planar double-enveloping torus worm-drive

• 环面蜗杆

Planar double-enveloping torus worm-drive的用法和样例：

例句

1. The equations of the meshing limit line in the first and second enveloping of the dual-torus double-enveloping toroidal worm drive are presented in this paper.
   推导了双圆环面包络环面蜗杆磨齿啮合界线方程及其与相配蜗轮啮合的啮合界线方程。