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发明名称
摘要
申请公布号
JPS5536211(U)
申请公布日期
1980.03.08
申请号
JP19780116360U
申请日期
1978.08.25
申请人
发明人
分类号
E01B29/16;(IPC1-7):E01B29/16
主分类号
E01B29/16
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代理人
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