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发明名称
摘要
申请公布号
JPS51104511(U)
申请公布日期
1976.08.21
申请号
JP19750023684U
申请日期
1975.02.19
申请人
发明人
分类号
E01D19/04;E01B9/68;E01D101/00;E01D101/40;E04B1/36;(IPC1-7):E01B9/68
主分类号
E01D19/04
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代理人
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