Lock washer and method of making same,申请号GB19470020139-传众专利搜索

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发明名称	Lock washer and method of making same
摘要
申请公布号	GB642601(A)	申请公布日期	1950.09.06
申请号	GB19470020139	申请日期	1947.07.25
申请人	ILLINOIS TOOL WORKS	发明人
分类号	B21D53/20	主分类号	B21D53/20
代理机构		代理人
主权项
地址

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