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公开(公告)号：US3391477A
公开(公告)日：1968-07-09
申请号：US50162765
申请日：1965-10-22
Applicant: ABBOTT LAB
Inventor： MICHALEK JOHN C , NAZARETH MAURICE R
IPC: G09B23/28
CPC classification number: G09B23/28
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