目前16S251是成为当今世界最强有力同步啮合的变速器.The 16 S 251 is now the most powerful synchromesh transmission in the world.齿合系数 --- 啮合的平均齿数.Contact ratio: the average number of teeth in contact.互相啮合的直齿圆柱齿轮,必须具有相同的径节.Meshing spur gears must...
她那闪闪发亮的眼睛, 那涨红的双颊和那急促的呼吸,都说明是一种恋爱中的冲动.Her shining eyes, the flushed cheeks and the breathlessness indicate some amorous excitement.她涨红的脸显示她很紧张.Her red face betrayed her nervousness....