发生线 meaning in English
generating line
generator line
line of generation
Examples
- Generating line of involute
渐开线发生线 - More line is not occurring interruption ( extinction ) , but stagnated in a state of evolution
更未发生线系中断（绝灭） ，而是处于停滞进化状态的结果。
generating line
generator line
line of generation