Improvements in or relating to piston rings,申请号GB19520021094-传众专利搜索

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发明名称	Improvements in or relating to piston rings
摘要
申请公布号	GB722068(A)	申请公布日期	1955.01.19
申请号	GB19520021094	申请日期	1952.08.22
申请人	ROBERT JOHN JONES	发明人
分类号	F16J9/14	主分类号	F16J9/14
代理机构		代理人
主权项
地址

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