第一类是由一块非球面反射镜和分别放置在它的前面和焦点前的两块非球面薄板组成的。
The first type consists of an aspheric mirror and two thin aspheric correcting plates, which are located in front of the mirror and its focus respectively.
公司下设销售部、大屏幕投影事业部，专门从事建筑玻璃和前表面反射镜的销售和技术服务。
Company founded large screen projection department, Special deal in sale and Technical service of front surface optical reflective mirror.
公司下设销售部、大屏幕投影事业部，专门从事建筑玻璃和前表面反射镜的销售和技术服务。
Company founded large screen projection department, Special deal in sale and Technical service of front surface optical reflective mirror.
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