{HEAD ~ Two optical signals} of {TAIL ~ reflected light emanate} from each of the four inspection regions and are directed toward two optical cameras, with the two optical signals from each of the optical regions being at different viewing angles and preferably from a single focal point 
{ HEAD ~ Two optical signals } of { TAIL ~ reflected light emanate } from each of the four inspection regions and are directed toward two optical cameras , with the two optical signals from each of the optical regions being at different viewing angles and preferably from a single focal point
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