a barrier that has parallel or crossed bars blocking a passage but admitting air
a frame of iron bars to hold a fire
optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum
双语例句
Both are polymer replicas of master gratings. 两个都是标准光栅的聚合物复制品。
Conception of new gratings with better efficiency and lower stray light. 高效率和低杂散光的新光栅核心理念。
