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Priority to JP4790074ApriorityCriticalpatent/JPS5547994B2/ja
Priority to DE19752500842prioritypatent/DE2500842C3/de
Publication of JPS50141411ApublicationCriticalpatent/JPS50141411A/ja
Publication of JPS5547994B2publicationCriticalpatent/JPS5547994B2/ja