SORTING and GRADING - Rainbow Trout

L)  -the grader with the proper size (spaced) grate is located over a tank
     - a net full of fish is dumped onto the grader

BL) - after the trout are dumped onto the tray, the smaller size falls through into the tank below

BR) - the larger trout that are too big to fall through the slots are dumped into
         an adjacent tank (note hinges).


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