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发明名称
摘要
申请公布号
JPS56151268(U)
申请公布日期
1981.11.12
申请号
JP19800048413U
申请日期
1980.04.10
申请人
发明人
分类号
E01B9/66;B66B7/02;(IPC1-7):B66B7/02
主分类号
E01B9/66
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代理人
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