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经营范围
发明名称
Drill feeding mechanism
摘要
申请公布号
US2102706(A)
申请公布日期
1937.12.21
申请号
US19360064790
申请日期
1936.02.19
申请人
WORTHINGTON PUMP AND MACHINERY CORPORATION
发明人
HIRSCHBERG CHARLES A.
分类号
E21B15/00;E21B19/086
主分类号
E21B15/00
代理机构
代理人
主权项
地址
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