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Individual
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Individual
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Priority to ES2631ApriorityCriticalpatent/ES2631A1/en
Publication of ES2631A1publicationCriticalpatent/ES2631A1/en
ES2631A1882-08-111882-08-11
Improvements in the mechanism to vary the distance of the wheels of railways or other permanent tracks.
ExpiredES2631A1
(en)
Improvements introduced in the devices destined to the complete realization of the operation of railways by sections, known by the name of "Block-system".