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经营范围
发明名称
Thermal piercing control
摘要
申请公布号
US3207238(A)
申请公布日期
1965.09.21
申请号
US19620215009
申请日期
1962.08.06
申请人
BUCYRUS-ERIE COMPANY
发明人
DAVIDSON TREVOR O.;ATKINSON WILLIAM P.
分类号
E21B7/14
主分类号
E21B7/14
代理机构
代理人
主权项
地址
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