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发明名称
摘要
申请公布号
SU454384(A1)
申请公布日期
1974.12.25
申请号
SU19731897606
申请日期
1973.03.27
申请人
发明人
分类号
F16J15/00;(IPC1-7):F16J15/00
主分类号
F16J15/00
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