variable-con-trast photographic paper

• 变反差相纸

variable-con-trast photographic paper的用法和样例：

例句

1. Photographic paper used for phototypesetting output.
   照相排字输出用的相纸。
2. Photogram Print made by the exposure of an object directly on photographic paper.
   实物构图直接用光把一个物体投射于相纸上所造成的图像。