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发明名称
摘要
申请公布号
JPH0141838(Y2)
申请公布日期
1989.12.08
申请号
JP19830174520U
申请日期
1983.11.10
申请人
发明人
分类号
E21D9/093;E21D9/06;(IPC1-7):E21D9/06
主分类号
E21D9/093
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代理人
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