“photoengraving”的概念、定义、翻译、参考文献-科学参考

单词	photoengraving
释义	photoengraving [¦fōd·ō·in`grāv·iŋ] ^{GRAPHIC ARTS} The technique of producing relief plates such as halftones or zinc etchings by photography; a metal plate is coated with a photosensitive emulsion and exposed to light under a reversed positive; the picture is developed by dissolving away the portion of the emulsion not acted upon by the light, and the plate is etched.
随便看	dielectric gas dielectric heating dielectric hysteresis dielectric imperfection levels dielectric leakage dielectric lens dielectric-lens antenna dielectric loss dielectric loss angle dielectric loss factor dielectric matching plate dielectric material dielectric phase angle dielectric polarization dielectric power factor dielectric-rod antenna dielectric shielding dielectric soak dielectric strength dielectric susceptibility dielectric test dielectric vapor detector dielectric waveguide dielectric wedge dielectric wire

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