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公开(公告)号：US1888454A
公开(公告)日：1932-11-22
申请号：US18235927
申请日：1927-04-09
Applicant: AMES CO B C
Inventor： EDSON WILLIAM R
CPC classification number: G01N3/56 , G01M13/04 , Y10S29/105 , Y10S33/01 , Y10S248/904 , Y10T29/53909
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