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Priority to JP6599982UpriorityCriticalpatent/JPS58171924U/ja
Publication of JPS58171924UpublicationCriticalpatent/JPS58171924U/ja
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Publication of JPS6223854Y2publicationCriticalpatent/JPS6223854Y2/ja
Tuyau de drainage en matiere plastique avec ouvertures d'admission d'eau ainsi que le procede et le dispositif pour fabriquer un tel tuyau de drainage