Draft gear,申请号US19290333757-传众专利搜索

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发明名称	Draft gear
摘要
申请公布号	US1947056(A)	申请公布日期	1934.02.13
申请号	US19290333757	申请日期	1929.01.21
申请人	AMERICAN STEEL FOUNDRIES	发明人	OELKERS ALFRED H.
分类号	B61G9/10	主分类号	B61G9/10
代理机构		代理人
主权项
地址

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