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Rack railway. Four kinds of rack from left to right Riggenbach Strub Abt Locher Zahnradsysteme vlnr Riggenbach Strub Abt hier mit Lamellen meistens nur Locher Quatre systmes de crmaillres de gauche droite Riggenbach Strub Abt lamelles Locher own work Aus einem eigenen Vortrag Rynacher Image Riggenbach Strub Abt Locher de