Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/950b7d722f0124ba11964caa30387cd7.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 photographic density是什么意思，photographic density的翻译，photographic density音标、读音、用法和例句_按摩法牛津词典
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. 当焊缝区域底片黑度变化超过透度计处黑度时，应在该处另加透度计。