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发明名称
摘要
申请公布号
JPH032796(Y2)
申请公布日期
1991.01.24
申请号
JP19850056746U
申请日期
1985.04.16
申请人
发明人
分类号
F16L55/18;G21F7/06;(IPC1-7):F16L55/18
主分类号
F16L55/18
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