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Priority to JP1981102474UpriorityCriticalpatent/JPS5810259U/ja
Priority to US06/396,293prioritypatent/US4521815A/en
Priority to DE3225888Aprioritypatent/DE3225888C2/de
Priority to KR2019820005434Uprioritypatent/KR900001541Y1/ko
Publication of JPS5810259UpublicationCriticalpatent/JPS5810259U/ja
Application grantedgrantedCritical
Publication of JPS6245307Y2publicationCriticalpatent/JPS6245307Y2/ja