Improvements in or relating to piston ring units for internal combustion and like piston engines,申请号GB19380037814-传众专利搜索

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发明名称	Improvements in or relating to piston ring units for internal combustion and like piston engines
摘要
申请公布号	GB523275(A)	申请公布日期	1940.07.10
申请号	GB19380037814	申请日期	1938.12.30
申请人	NATHAN SALLY STERN	发明人
分类号	F16J9/06;F16J9/20	主分类号	F16J9/06
代理机构		代理人
主权项
地址

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