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发明名称
摘要
申请公布号
DE2107089(A1)
申请公布日期
1971.09.09
申请号
DE19712107089
申请日期
1971.02.15
申请人
CEN
发明人
分类号
F16L23/00;(IPC1-7):F16L23/00
主分类号
F16L23/00
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代理人
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