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Priority claimed from JP1987156078Uexternal-prioritypatent/JPH0751651Y2/ja
Priority claimed from JP1987163641Uexternal-prioritypatent/JPH0620217Y2/ja
Application filed by Sigma KkfiledCriticalSigma Kk
Priority claimed from EP88309516Aexternal-prioritypatent/EP0312316B1/de
Application grantedgrantedCritical
Publication of ATE96238T1publicationCriticalpatent/ATE96238T1/de