Means for expanding piston rings,申请号US19370150829-传众专利搜索

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发明名称	Means for expanding piston rings
摘要
申请公布号	US2135415(A)	申请公布日期	1938.11.01
申请号	US19370150829	申请日期	1937.06.28
申请人	SIEVEN LOUIS I	发明人	SIEVEN LOUIS I.
分类号	F16J9/06	主分类号	F16J9/06
代理机构		代理人
主权项
地址

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