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公开(公告)号：US2717945A
公开(公告)日：1955-09-13
申请号：US41989254
申请日：1954-03-30
Applicant: GEN ELECTRIC
Inventor： DRESIOS SAMUEL C , BRIGGS WALTON E
IPC: G01K7/18
CPC classification number: G01K7/18
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