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B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
B60D1/28—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for preventing unwanted disengagement, e.g. safety appliances
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FR1139784D1954-12-021955-11-28Dispositif de sécurité pour tracteurs et autres véhicules semblables à roues arrière motrices
ExpiredFR1139784A
(fr)