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H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
FR640102D1926-08-311927-08-27Dispositif de contact pour interrupteurs électriques, distributeurs, rupteurs et appareillage électrique similaire
ExpiredFR640102A
(fr)