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公开(公告)号：KR820001399Y1
公开(公告)日：1982-07-03
申请号：KR820003513
申请日：1982-05-04
Applicant: HITACHI LTD
Inventor： KASIMURA S , TSUKUSI M , SASAKI K , HIRASAWA K , YOSIOKA Y , SATO M
IPC: H01H33/70
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