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发明名称
摘要
申请公布号
JPH0450425(U)
申请公布日期
1992.04.28
申请号
JP19900090125U
申请日期
1990.08.30
申请人
发明人
分类号
E01F13/00;G09F13/16;(IPC1-7):E01F13/00
主分类号
E01F13/00
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