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Priority to JP1381169UpriorityCriticalpatent/JPS4738828Y1/ja
Priority to GB754370Aprioritypatent/GB1304431A/en
Priority to DE2007479Aprioritypatent/DE2007479C3/de
Priority to US142060Aprioritypatent/US3676823A/en
Publication of JPS4738828Y1publicationCriticalpatent/JPS4738828Y1/ja