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发明名称
摘要
申请公布号
SU530143(A1)
申请公布日期
1976.09.30
申请号
SU19741999042
申请日期
1974.02.25
申请人
发明人
分类号
F16L9/18;(IPC1-7):F16L9/18
主分类号
F16L9/18
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