Spiral excavating bucket,申请号US19620182281-传众专利搜索

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发明名称	Spiral excavating bucket
摘要
申请公布号	US3102348(A)	申请公布日期	1963.09.03
申请号	US19620182281	申请日期	1962.03.26
申请人	BURNS ARTHUR A	发明人	BURNS ARTHUR A.
分类号	E02F5/20;E21B27/00	主分类号	E02F5/20
代理机构		代理人
主权项
地址

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