Duct connection box,申请号US19310540942-传众专利搜索

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发明名称	Duct connection box
摘要
申请公布号	US1921057(A)	申请公布日期	1933.08.08
申请号	US19310540942	申请日期	1931.05.29
申请人	WALKER HERVEY S	发明人	WALKER HERVEY S.
分类号	H02G3/18	主分类号	H02G3/18
代理机构		代理人
主权项
地址

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