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公开(公告)号：US3425476A
公开(公告)日：1969-02-04
申请号：US3425476D
申请日：1966-10-04
Applicant: ALFRED LEGG
Inventor： LEGG ALFRED
CPC classification number: B29C73/06 , B29C73/08 , Y10T152/10909
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