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经营范围
发明名称
Core drill
摘要
申请公布号
US2708104(A)
申请公布日期
1955.05.10
申请号
US19500197153
申请日期
1950.11.22
申请人
ANACONDA COPPER MINING COMPANY
发明人
MCALLISTER DONALD CAMERON
分类号
E21B10/48;E21B10/60;E21B25/12
主分类号
E21B10/48
代理机构
代理人
主权项
地址
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