CO2 (sealed tube)lasers
二氧化碳雷射(密封型)

• photographic method
• photographic negative
• photographic optics
• photographic photmetry
• photographic plate
• photographic printing paper
• photographic reconnaissance
• photographic recorder
• photographic refractor
• photographic reproduction
• photographic sensitometer
• photographic snesitivity
• photographic sound recorder
• photographic standard irradiance
• photographic tansmission density
• photographic zenith tube
• photography
• photogravure
• photogroduct
• photogun
• photohalide
• photo-Hall effect
• photohead
• photoheliograph
• photoheliography