| http://www.w3.org/ns/prov#value | - For the purpose of demonstrating the invention, however, the same has been shown as applied in apparatus of the sort providing for the inspection of metal cans of the class commonly employed as containers for beer, oil, or other liquid products, in order to determine whether or not the cans are filled to a desired level, and to mark, eject, separate or otherwise distinguish between correctly and i
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