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发明名称
摘要
申请公布号
JPH07103521(B2)
申请公布日期
1995.11.08
申请号
JP19900401045
申请日期
1990.12.10
申请人
发明人
分类号
E01B27/10;(IPC1-7):E01B27/10
主分类号
E01B27/10
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