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发明名称
Gasabsaugleitung
摘要
申请公布号
DE1758421(A1)
申请公布日期
1971.01.28
申请号
DE19681758421
申请日期
1968.05.29
申请人
FA.A.BERG
发明人
HAMACHER,HANS
分类号
E21F7/00;F16L21/08;F16L37/04
主分类号
E21F7/00
代理机构
代理人
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地址
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