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公开(公告)号：US3163503A
公开(公告)日：1964-12-29
申请号：US4959960
申请日：1960-08-15
Applicant: BLACK CLAWSON CO
Inventor： MCKELLAR ROBERT R , LYNCH JOHN D , MARSH GEORGE R , CONTURE JOSEPH W , FRANK HAYNES
IPC: D21F5/02
CPC classification number: D21F5/02
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