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发明名称
摘要
申请公布号
JP2521938(Y2)
申请公布日期
1997.01.08
申请号
JP19900401590U
申请日期
1990.12.25
申请人
发明人
分类号
F16K31/53;F16K37/00;(IPC1-7):F16K37/00
主分类号
F16K31/53
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代理人
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