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发明名称
摘要
申请公布号
JPS59152025(U)
申请公布日期
1984.10.12
申请号
JP19830047011U
申请日期
1983.03.31
申请人
发明人
分类号
F16L43/00;E04D13/068;(IPC1-7):E04D13/06
主分类号
F16L43/00
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