Improved process and apparatus for making helical tension springs having particularly great preliminary tension,申请号GB19390018537-传众专利搜索

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发明名称	Improved process and apparatus for making helical tension springs having particularly great preliminary tension
摘要
申请公布号	GB530487(A)	申请公布日期	1940.12.12
申请号	GB19390018537	申请日期	1939.06.26
申请人	OTTO SCHMID	发明人
分类号	B21F3/06	主分类号	B21F3/06
代理机构		代理人
主权项
地址

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