Pneumatically-controlled soil sampler,申请号US19490091206-传众专利搜索

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发明名称	Pneumatically-controlled soil sampler
摘要
申请公布号	US2664269(A)	申请公布日期	1953.12.29
申请号	US19490091206	申请日期	1949.05.03
申请人	KNIGHT ELTON G;MILLER JOHN W	发明人	KNIGHT ELTON G.;MILLER JOHN W.
分类号	E21B25/00	主分类号	E21B25/00
代理机构		代理人
主权项
地址

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