Improvements in piston rings,申请号GB19300033825-传众专利搜索

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发明名称	Improvements in piston rings
摘要
申请公布号	GB373099(A)	申请公布日期	1932.05.19
申请号	GB19300033825	申请日期	1930.11.10
申请人	LEOPOLD RAAB;ALWIN RETITZKI	发明人
分类号	F16J9/20	主分类号	F16J9/20
代理机构		代理人
主权项
地址

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