Check machinery and other tools for physical or functional damage and inform the repair person about the same (bestsampleresume.com)
Generally, what this means is that the product has been created on an assembly line alongside other products which do contain milk, or perhaps created using the same machinery. (veggieful.com)
«Traces» generally just means it is produced on the same machinery or in the same area as the products that contain soy lecithin, so it's probable that some has transferred into the product. (marksdailyapple.com)