缩微摄影时检验负像光学密度用测试标板 meaning in English
micrographics-test target of optical density measurement for microfilming negative
Examples
- Micrographics - test target of optical density measurement for microfilming negative
缩微摄影技术缩微摄影时检验负像光学密度用测试标板
micrographics-test target of optical density measurement for microfilming negative