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Priority to JP4758888UpriorityCriticalpatent/JPH0538095Y2/ja
Priority to NO88885330Aprioritypatent/NO885330L/no
Priority to CA000585558Aprioritypatent/CA1320859C/en
Publication of JPH01150617UpublicationCriticalpatent/JPH01150617U/ja
Application grantedgrantedCritical
Publication of JPH0538095Y2publicationCriticalpatent/JPH0538095Y2/ja