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经营范围
发明名称
Miner's drill
摘要
申请公布号
US1757725(A)
申请公布日期
1930.05.06
申请号
US19280291610
申请日期
1928.07.10
申请人
PAUL LESKO
发明人
LESKO PAUL
分类号
E21B3/02;E21B11/00;E21B19/081
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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