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发明名称
摘要
申请公布号
JPS546889(Y2)
申请公布日期
1979.04.02
申请号
JP19740044768U
申请日期
1974.04.22
申请人
发明人
分类号
F16L21/08;(IPC1-7):F16L21/08
主分类号
F16L21/08
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