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公开(公告)号：US2095012A
公开(公告)日：1937-10-05
申请号：US9974036
申请日：1936-09-08
Applicant: METROPOLITAN PAVING BRICK COMP
Inventor： RENKERT OLIVER W
IPC: E01C5/04
CPC classification number: E01C5/04 , E01C2201/02
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