Gate apparatus for surface irrigation pipes,申请号US19360098891-传众专利搜索

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发明名称	Gate apparatus for surface irrigation pipes
摘要
申请公布号	US2129758(A)	申请公布日期	1938.09.13
申请号	US19360098891	申请日期	1936.09.01
申请人	SIGMUND FREY	发明人	FREY SIGMUND
分类号	E02B13/00	主分类号	E02B13/00
代理机构		代理人
主权项
地址

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