国产中文字幕乱码免费,野花日本大全免费观看3中文,最近的2019中文字幕国语,天堂亚洲国产中文在线,国产精品亚洲精品日韩已满十八小,欧美卡一卡二卡新区乱码,野花社区在线观看www,久久久久亚洲精品成人网,年轻的老师5在线观看高清中文,又黄又网站国产

Optical curve grinder is used to grind precision and complex surfaces, including straight lines, arcs, and curves. During the grinding process, the workpiece and grinding wheel can be magnified 50 times by an optical system and projected onto a screen. During work, the operator can observe the grinding wheel processing along the workpiece surface on the screen at any time. The movement of the workpiece can be manually operated or controlled by a DC motor to achieve the purpose of processing the surface.