“direct positive”的概念、定义、翻译、参考文献-科学参考

单词	direct positive
释义	direct positive [dǝ¦rekt `päz·ǝd·iv] ^{GRAPHIC ARTS} A photographic positive made by exposure to light and developed without a negative.
随便看	electronographic tube electronography electronoluminescence electron optics electron orbit electron pair electron pair bond electron paramagnetic resonance electron paramagnetism electron-positron pair electron-positron storage ring electron probe electron probe x-ray microanalysis electron radiography electron radius electron-ray indicator electron-ray tube electron refraction electron rest mass electron ring accelerator electron shell electron spectroscopy electron spectroscopy for chemical analysis electron spectrum electron spin

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