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公开(公告)号:WO2012155534A1
公开(公告)日:2012-11-22
申请号:PCT/CN2012/000656
申请日:2012-05-15
Applicant: 李开超
Inventor: 李开超
IPC: E01F9/013 , G09F9/30
CPC classification number: G09F9/30 , B60Q7/00 , E01F9/688 , F42B12/68 , G09F7/18 , G09F21/06 , G09F2007/1878