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公开(公告)号：US2701170A
公开(公告)日：1955-02-01
申请号：US30504252
申请日：1952-08-18
Applicant: KAPELLA LTD
Inventor： EDMUND REASON RICHARD , ORMEROD RAWSTRON GEORGE
CPC classification number: B23Q1/5456 , B23Q1/70 , G01B5/0004
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