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Priority to JP1981086215UpriorityCriticalpatent/JPS63418Y2/ja
Publication of JPS57199418UpublicationCriticalpatent/JPS57199418U/ja
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Publication of JPS63418Y2publicationCriticalpatent/JPS63418Y2/ja
Verfahren zum herstellen eines innen glatten, aussen gerippten rohres aus extrudierbarem kunststoff sowie vorrichtung zur durchfuehrung des verfahrens.