底片

I have three exposures left on this film.

这卷胶卷我还有三张未拍。

How many exposures have you made?

你拍过几张了?

Block out this unimportant detail at the top of your picture.

在把图像这个不重要细节涂抹掉。

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个环节控制,有效提高射线质量。

For areas where the film density through the weld varies by more than from the density through the penetrameter, an additional penetrameter shall be used for those areas.

当焊缝区黑度变化超过透度计处黑度时，应在该处另加透度计。