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Application filedfiledCritical
Priority to JP1976080460UpriorityCriticalpatent/JPS553760Y2/ja
Priority to GB1350177Aprioritypatent/GB1565860A/en
Priority to NL7703582Aprioritypatent/NL176992C/xx
Priority to DE19772714709prioritypatent/DE2714709C3/de
Publication of JPS52170530UpublicationCriticalpatent/JPS52170530U/ja
Application grantedgrantedCritical
Publication of JPS553760Y2publicationCriticalpatent/JPS553760Y2/ja