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
变化超
透计处时，应在该处另加透计。
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.
当焊缝区域底变化超透计处时，应在该处另加透计。
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