| http://www.w3.org/ns/prov#value | - Lower frequency light is also useful in distinguishing betweenagricultural products and foreign materials, such as stems, glass and plastics, which are often inadvertently included with the products during harvest or subsequent processing.Commonly owned U.S. Pat. No. 4,697,709, of which Applicant Codding is a named inventor, describes a monochromatic sorting apparatus having a plurality of optical
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