Long-stroke pumping jack,申请号US19280270536-传众专利搜索

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发明名称	Long-stroke pumping jack
摘要
申请公布号	US1752144(A)	申请公布日期	1930.03.25
申请号	US19280270536	申请日期	1928.04.16
申请人	BURT LAWRENCE G	发明人	BURT LAWRENCE G.
分类号	F04B9/04	主分类号	F04B9/04
代理机构		代理人
主权项
地址

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