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发明名称
摘要
申请公布号
JPH0312955(U)
申请公布日期
1991.02.08
申请号
JP19890069853U
申请日期
1989.06.16
申请人
发明人
分类号
E02F9/00;F16B21/12;(IPC1-7):E02F9/00
主分类号
E02F9/00
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代理人
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