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发明名称
摘要
申请公布号
JPH03108096(U)
申请公布日期
1991.11.07
申请号
JP19900017162U
申请日期
1990.02.22
申请人
发明人
分类号
E21D11/08;(IPC1-7):E21D11/08
主分类号
E21D11/08
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代理人
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地址
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