单词	保持频率
释义	同保持频率--固定频率运行方式
随便看	optical haze optical head optical header detection optical heterodyne optical heterodyne detection optical heterodyne radar optical heterodyne super-wide-band fm converter optical heterodyning optical hole burning optical hologrammetry optical holography optical homodyne detection optical hybrid integration optical hydrophone optical hygrometer optical illusion optical illusion art optical illusion drawings optical image optical image input unit optical image processing optical image processing optical modulation optical image processor optical image processor，oip optical imagery