An improved oil scraping ring assembly,申请号GB19530001517-传众专利搜索

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发明名称	An improved oil scraping ring assembly
摘要
申请公布号	GB740375(A)	申请公布日期	1955.11.09
申请号	GB19530001517	申请日期	1953.01.19
申请人	DONALD JULIUS GROEN	发明人
分类号	F16J9/20;H04B1/14	主分类号	F16J9/20
代理机构		代理人
主权项
地址

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