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发明名称
摘要
申请公布号
JPH0489185(U)
申请公布日期
1992.08.04
申请号
JP19900403217U
申请日期
1990.12.12
申请人
发明人
分类号
E03F11/00;(IPC1-7):E03F11/00
主分类号
E03F11/00
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代理人
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