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摘要
申请公布号
SU475460(A1)
申请公布日期
1975.06.30
申请号
SU19731943859
申请日期
1973.07.16
申请人
发明人
分类号
F16L37/084;F16L37/00;(IPC1-7):F16L37/00
主分类号
F16L37/084
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