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发明名称
摘要
申请公布号
JPS535906(U)
申请公布日期
1978.01.19
申请号
JP19760086702U
申请日期
1976.07.02
申请人
发明人
分类号
E01B11/42;E01B11/24;E01B11/26;E01B25/00;E01B25/24;(IPC1-7):E01B11/24
主分类号
E01B11/42
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