Rock drill supporting device,申请号GB19480031636-传众专利搜索

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发明名称	Rock drill supporting device
摘要
申请公布号	GB649239(A)	申请公布日期	1951.01.24
申请号	GB19480031636	申请日期	1948.12.07
申请人	THE EIMCO CORPORATION	发明人
分类号	E21B7/02	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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