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发明名称	Multiple operated window
摘要
申请公布号	US2799903(A)	申请公布日期	1957.07.23
申请号	US19530354967	申请日期	1953.05.14
申请人	DRUWHIT METAL PRODUCTS CO.	发明人	ALEXANDER ROBERT L.
分类号	E06B3/50	主分类号	E06B3/50
代理机构		代理人
主权项
地址

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