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发明名称
摘要
申请公布号
JPH0470315(U)
申请公布日期
1992.06.22
申请号
JP19900113980U
申请日期
1990.10.30
申请人
发明人
分类号
E01D19/12;E01D2/00;E01D101/40;(IPC1-7):E01D19/12
主分类号
E01D19/12
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