a photographic plate measuring 3.25 inches by 4.25 inches
双语例句
1
Fundamentals of various quarter wave plates are presented firstly in this paper.
概括介绍了各种四分之一波片的基本原理。
2
Its request for monochromaticity of source is low. The equipments and procedure of this method are simple, but suitable for quarter-wave plates of various wave lengths.