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Application filed by 추연한filedCritical추연한
Priority to KR2019860006890UpriorityCriticalpatent/KR890000602Y1/ko
Publication of KR870017707UpublicationCriticalpatent/KR870017707U/ko
Application grantedgrantedCritical
Publication of KR890000602Y1publicationCriticalpatent/KR890000602Y1/ko