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发明名称
摘要
申请公布号
JP3009526(B2)
申请公布日期
2000.02.14
申请号
JP19910316994
申请日期
1991.11.29
申请人
发明人
分类号
E21F1/00;(IPC1-7):E21F1/00
主分类号
E21F1/00
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代理人
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