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Priority to JP14995175ApriorityCriticalpatent/JPS5272719A/ja
Publication of JPS5272719ApublicationCriticalpatent/JPS5272719A/ja
Publication of JPS5634467B2publicationCriticalpatent/JPS5634467B2/ja
JP14995175A1975-12-161975-12-16Method of production of construction member having heat and sound insulating opening inside said member
GrantedJPS5272719A
(en)