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公开(公告)号：US1334874A
公开(公告)日：1920-03-23
申请号：US33283219
申请日：1919-10-23
Applicant: ISAAC FELDENHEIMER
Inventor： MILLER JAMES B , BRUNINGA JOHN H
IPC: G01L17/00
CPC classification number: G01L17/00 , Y10T137/3662
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