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发明名称
摘要
申请公布号
JPH0522608(U)
申请公布日期
1993.03.23
申请号
JP19910032825U
申请日期
1991.04.11
申请人
发明人
分类号
E01C13/00;E01C13/08;(IPC1-7):E01C13/00
主分类号
E01C13/00
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代理人
主权项
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