日本一区二区视频在线播放_97超碰国产精品_japanese在线观看_99国产精品一区二区三区_草久久免费视频_中文字幕一区久久_av免费在线播放网站_中文字幕第一页亚洲_亚洲av网址在线_91麻豆成人精品国产

Precision machining is a machining method with machining accuracy up to 1 micron. Precision machining method mainly includes fine turning, fine boring, fine milling, fine grinding and grinding technology. Under strictly controlled environmental conditions, the use of precision machine tools and precision measuring tools and measuring instruments to achieve. Machining accuracy of 0.1 micron or more is called ultra precision machining. In the aerospace industry, precision machining is mainly used to process precision mechanical parts in aircraft control equipment, such as hydraulic and pneumatic servomechanics.