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Priority to JP7412273ApriorityCriticalpatent/JPS5324005B2/ja
Publication of JPS5021916ApublicationCriticalpatent/JPS5021916A/ja
Publication of JPS5324005B2publicationCriticalpatent/JPS5324005B2/ja
Method for spreading bulk materials from closed space and apparatus for charging the material or materials to be spread into closed space and for pressurizing same