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B61J3/00—Shunting or short-distance haulage devices; Similar devices for hauling trains on steep gradients or as starting aids; Car propelling devices therefor
B61J3/02—Gravity shunting humps
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FR532543D1920-05-041921-03-21Perfectionnements aux systèmes à gravité pour voies ferrées
ExpiredFR532543A
(fr)