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Priority to JP1780882UpriorityCriticalpatent/JPS58120205U/ja
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Publication of JPS6120086Y2publicationCriticalpatent/JPS6120086Y2/ja
Chiusino in ghisa o in altro materiale idoneo,antisdrucciolevole per rilievi quadrati o di altra forma nella superficie superiore con tela io a tronco di piramide quadrangolare o meno,incassabile e livellabile in qualsiasi tipo di pavimentazione stradale o di marciapiede con qualunque pendenza mediante nervature esterne e falda perimetrale esterna