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B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
B66C3/12—Grabs actuated by two or more ropes
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FR58959D1949-01-041949-01-04Dispositif de commande à tambour différentiel pour bennes automatiques
ExpiredFR58959E
(fr)