窗口片 meaning in English

diaphragm

Xin xing liang electric - optics of jilin province , co . , ltd . it has evolved into a unique company , specializing in the manufacture of cylindrical lens etc . we employ some experienced engineers and technical personnel from chang chun institute of optics , fine mechanics and physics , which is part of the chinese academy of science
柱面镜，光学镜片，光学，镜片，棱镜，窗口片，反射镜，透镜，球面镜，滤光片，消色差吉林省新星亮光电有限公司原长春市朝阳区升光学镜片加工部是一家专门从事光学冷加工的实体企业。