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Individual
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Priority to ES127834ApriorityCriticalpatent/ES127834A1/en
Publication of ES127834A1publicationCriticalpatent/ES127834A1/en
ES127834A1932-08-301932-08-30
Procedure for the manufacture of cement and asbestos pipes or similar mixtures of non-circular section.
ExpiredES127834A1
(en)