photographic density
英漢例句
- 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.
當(dāng)焊縫區(qū)域底片黑度變化超過透度計(jì)處黑度時(shí)，應(yīng)在該處另加透度計(jì)。