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发明名称
摘要
申请公布号
JPH0372984(U)
申请公布日期
1991.07.23
申请号
JP19890132087U
申请日期
1989.11.15
申请人
发明人
分类号
E03F3/00;(IPC1-7):E03F3/00
主分类号
E03F3/00
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代理人
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