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经营范围
发明名称
Drill bits with removable orifice nozzles
摘要
申请公布号
GB763676(A)
申请公布日期
1956.12.12
申请号
GB19550000093
申请日期
1955.01.03
申请人
FRITZ HUNTSINGER;MATHILDE HUNTSINGER;CARL FREDRIC HUNTSINGER;FRITZ ROY HUNTSINGER;JAMES WILLIAM ELLISON HANES;JOEL LEE GLENN
发明人
分类号
E21B10/18
主分类号
E21B10/18
代理机构
代理人
主权项
地址
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