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发明名称
摘要
申请公布号
JPS5390306(U)
申请公布日期
1978.07.24
申请号
JP19760174250U
申请日期
1976.12.24
申请人
发明人
分类号
E01B11/02;(IPC1-7):E01B11/02
主分类号
E01B11/02
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