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Priority to JP13484688UpriorityCriticalpatent/JPH0254992U/ja
Priority to US07/420,900prioritypatent/US5026025A/en
Priority to GB8923258Aprioritypatent/GB2225090B/en
Priority to IT02203289Aprioritypatent/IT1236953B/it
Publication of JPH0254992UpublicationCriticalpatent/JPH0254992U/ja