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发明名称
摘要
申请公布号
JPS5228168(U)
申请公布日期
1977.02.26
申请号
JP19750113501U
申请日期
1975.08.18
申请人
发明人
分类号
F16L57/00;F16L58/00;F16L59/00;F16L59/16;F16L59/22;(IPC1-7):F16L59/00
主分类号
F16L57/00
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