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发明名称
摘要
申请公布号
JPS556882(Y2)
申请公布日期
1980.02.16
申请号
JP19750108709U
申请日期
1975.08.06
申请人
发明人
分类号
E01D19/12;E01D2/00;E01D2/02;E04B5/40;E04C3/08;(IPC1-7):E04B5/40
主分类号
E01D19/12
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