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Application filed by Albert Ramseier, Rene LefebvrefiledCriticalAlbert Ramseier
Publication of CH80571ApublicationCriticalpatent/CH80571A/en
Transmission device for rotating a shaft alternately in both directions, for example for controlling valve lapping machines, saws, milling machines or the like
Improvements made to gear shifting systems, such as, in particular, those interposed in certain machine tools between the motor shaft and the tool holder whose rotation it controls