日本免费A片一区二区三区四区

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      News Technical knowledge
      The global classification based on the optical professional screen:
      ?Published: 2012.11.01 ??Views:1139Secondary
      Reflection type screen: the screen of the same characteristics of the incident angle and the reflection angle,
      Regression screen: the same direction of the incident light and the reflected light returns screen
      Reflecting the incident light equally screen diffuse reflection-type screen:
      2) HD transmissive screen: the incident light through the screen surface to form a wide viewing angle, and restore the true resolution of the projected image and the color screen.

       

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      日本免费A片一区二区三区四区