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经营范围
发明名称
Improvements in or relating to ventilation shafts
摘要
申请公布号
GB896954(A)
申请公布日期
1962.05.23
申请号
GB19600007958
申请日期
1960.03.07
申请人
ALBRECHT GRAFER;HUGO NUESSE
发明人
GRAFER ALBRECHT;JAHNKE ALBERT;NUESSE HUGO
分类号
E21F1/00;F24F13/08
主分类号
E21F1/00
代理机构
代理人
主权项
地址
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