Filed Dec. 3 , 1979 , Ser . No. 99,945 6b Int . C1 . ) B66B 1/18 9 U.S. C. 187–29 R 7 Claims 6а CTRLA PIC . 3 3b 5 6 PTT CAR CTRL CAR CTEUR OP / MO 9a 9b 3c ...
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