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Coal Industry Patents Ltd
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Coal Industry Patents Ltd
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Application filed by Coal Industry Patents LtdfiledCriticalCoal Industry Patents Ltd
Priority to ES361339ApriorityCriticalpatent/ES361339A1/en
Publication of ES361339A1publicationCriticalpatent/ES361339A1/en
A deformable support device for a mine roof comprising a cylindrical tube having circumferentially arranged depressions, which are located in a common plane which forms a right angle with the longitudinal central axis of the tube and which determine the configuration of the deformation of the tube when it is deformed under an axial compressive load. (Machine-translation by Google Translate, not legally binding)
ES361339A1968-12-121968-12-12A deformable support device for a mine ceiling. (Machine-translation by Google Translate, not legally binding)
ExpiredES361339A1
(en)