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，有效提高射线底片的质量。

youdao

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，有效提高射线底片的质量。

youdao