IT1032039B - Sistema di perforazione e metodo per il sollevamento
- Google Patents
Sistema di perforazione e metodo per il sollevamento
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Publication number
IT1032039B
IT1032039BIT5343273AIT5343273AIT1032039BIT 1032039 BIT1032039 BIT 1032039BIT 5343273 AIT5343273 AIT 5343273AIT 5343273 AIT5343273 AIT 5343273AIT 1032039 BIT1032039 BIT 1032039B
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Priority claimed from JP13275272Uexternal-prioritypatent/JPS5148562Y2/ja
Priority claimed from JP8459473Aexternal-prioritypatent/JPS5228081B2/ja
Priority claimed from JP8852073Aexternal-prioritypatent/JPS5213763B2/ja
Priority claimed from JP9364073Uexternal-prioritypatent/JPS5040801U/ja
Priority claimed from JP9723373Uexternal-prioritypatent/JPS548082Y2/ja
Application filed by Sumitomo Metal Mining CofiledCriticalSumitomo Metal Mining Co
Application grantedgrantedCritical
Publication of IT1032039BpublicationCriticalpatent/IT1032039B/it