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Priority claimed from JP49072458Aexternal-prioritypatent/JPS512160A/ja
Priority claimed from JP1974079189Uexternal-prioritypatent/JPS518189U/ja
Priority claimed from JP8827474Aexternal-prioritypatent/JPS535975B2/ja
Priority claimed from FI751881Aexternal-prioritypatent/FI58355C/fi
Application filed by Mitsui Mining & Smelting CofiledCriticalMitsui Mining & Smelting Co
Publication of FI792937ApublicationCriticalpatent/FI792937A/fi