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Priority claimed from DEB133937Dexternal-prioritypatent/DE556251C/de
Priority claimed from DEB134436Dexternal-prioritypatent/DE566537C/de
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Procédé pour la fabrication par extrusion en continu de tubes et tuyaux en matiére plastique contenant une armature tubulaire fibreuse, et dispositif pour la mise en oeuvre du procédé