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Priority claimed from KR2019900002972Uexternal-prioritypatent/KR900005695Y1/en
Application filed by Yoo Young YoonfiledCriticalYoo Young Yoon
Priority to SG130494ApriorityCriticalpatent/SG130494G/en
Publication of SG130494GpublicationCriticalpatent/SG130494G/en