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经营范围
发明名称
Improvements in and relating to filters
摘要
申请公布号
GB491307(A)
申请公布日期
1938.08.29
申请号
GB19360029413
申请日期
1936.11.28
申请人
JOHANNES WIEBE
发明人
分类号
B01D33/00
主分类号
B01D33/00
代理机构
代理人
主权项
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