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发明名称
摘要
申请公布号
JPH0571204(U)
申请公布日期
1993.09.28
申请号
JP19920018034U
申请日期
1992.02.26
申请人
发明人
分类号
E01B29/28;E01B29/24;(IPC1-7):E01B29/28
主分类号
E01B29/28
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代理人
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