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发明名称
摘要
申请公布号
JPH0399098(U)
申请公布日期
1991.10.16
申请号
JP19900008677U
申请日期
1990.01.31
申请人
发明人
分类号
E21D11/04;E21D11/08;(IPC1-7):E21D11/04
主分类号
E21D11/04
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