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发明名称
摘要
申请公布号
JPH0297496(U)
申请公布日期
1990.08.02
申请号
JP19890004531U
申请日期
1989.01.18
申请人
发明人
分类号
E21D9/06;B08B9/04;B08B9/049;E21D9/13;E21D11/00;(IPC1-7):E21D11/00
主分类号
E21D9/06
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代理人
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地址
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