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发明名称	Filter
摘要
申请公布号	US2800195(A)	申请公布日期	1957.07.23
申请号	US19550491016	申请日期	1955.02.28
申请人	MINE SAFETY APPLIANCES COMPANY	发明人	BUB ROBERT A.
分类号	B01D46/52	主分类号	B01D46/52
代理机构		代理人
主权项
地址

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