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发明名称
摘要
申请公布号
JP2550440(Y2)
申请公布日期
1997.10.15
申请号
JP19900027485U
申请日期
1990.03.16
申请人
发明人
分类号
F16K47/02;E03C1/042;(IPC1-7):F16K47/02
主分类号
F16K47/02
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