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Priority to ES0076771UpriorityCriticalpatent/ES76771Y/en
Publication of ES76771UpublicationCriticalpatent/ES76771U/en
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Publication of ES76771YpublicationCriticalpatent/ES76771Y/en
Rule for drawing parallels characterized by comprising a ruler of bevelled outer profile and bottom plate in its lower profile, which has a prolongation, upper longitudinal carrier of an axis with two rollers, externally grinded and integral with said axis, and why said rollers They protrude slightly from the bottom of the ruler. (Machine-translation by Google Translate, not legally binding)