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公开(公告)号：US1761631A
公开(公告)日：1930-06-03
申请号：US26539828
申请日：1928-03-28
Applicant: METROPOLITAN PAVING BRICK COMP
Inventor： KEPLINGER ROBERT B , KANENGEISER PAUL A
IPC: B28B11/06
CPC classification number: B28B11/06
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