Especially in the surfacecomplex, precision parts that require high volume production, the use of diamond grinding wheel for dressing on the more significant effect.
特别是在型面复杂、精度要求高的零件批量生产中,采用金刚石滚轮对磨具进行修整效果更为显著。
2
Complex life evolved on the Earth's surface, but not on Mars or other planets in the solar system because on those planets, early surface life was killed by UV radiation.