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发明名称
SCALPELLO DI TRIVELLAZIONE CON SUPERFICIE RESISTENTE ALL'USURA PER GUARNIZIONI DI TENUTA ELASTOMERE
摘要
申请公布号
IT8948619(D0)
申请公布日期
1989.11.30
申请号
IT19890048619
申请日期
1989.11.30
申请人
DRESSER INDUSTRIES INC.
发明人
LANGFORD JAMES W.,JR.
分类号
E21B10/22;E21B10/25;F16J15/32;(IPC1-7):E21B/
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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