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发明名称	ROOF
摘要
申请公布号	CA321837(A)	申请公布日期	1932.04.26
申请号	CAD321837	申请日期
申请人	THE CANADIAN GYPSUM COMPANY	发明人	ARTHUR A. HEEREN
分类号		主分类号
代理机构		代理人
主权项
地址

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