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发明名称
Filter system
摘要
申请公布号
US1985030(A)
申请公布日期
1934.12.18
申请号
US19310524879
申请日期
1931.03.24
申请人
WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY
发明人
HANNA CLINTON R.
分类号
G03B1/46;G03B31/00;G11B15/34
主分类号
G03B1/46
代理机构
代理人
主权项
地址
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