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公开(公告)号：US2427529A
公开(公告)日：1947-09-16
申请号：US54670044
申请日：1944-07-26
Applicant: CLEVELAND PATENTS INC
Inventor： HICKOK ROBERT D , MONTGOMERY LAWRENCE D
IPC: G01R1/10
CPC classification number: G01R1/10
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