暗室

The pupils of your eyes dilate when you enter a dark room.

你进入暗室时，你的眼睛的瞳孔就会扩大。

Through controlling the each step in process of darkroom disposal,improve the quality of the sciagram efficently.

通过对暗室处理过程中各个环节的控制,有效提高线底片的质量。