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Priority to JP2963188UpriorityCriticalpatent/JPH0527353Y2/ja
Priority to CN 89102509prioritypatent/CN1013987B/zh
Priority to US07/318,712prioritypatent/US4925322A/en
Publication of JPH01132484UpublicationCriticalpatent/JPH01132484U/ja
Application grantedgrantedCritical
Publication of JPH0527353Y2publicationCriticalpatent/JPH0527353Y2/ja