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公开(公告)号：US3169251A
公开(公告)日：1965-02-16
申请号：US14848261
申请日：1961-10-30
Applicant: PARAMETRICS RES & DEV COMPANY
Inventor： HUMES JR HAROLD L
CPC classification number: A42B1/201 , A42C5/04 , Y10T428/24149
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