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发明名称
GUARNIZIONE DI TENUTA AD ALTA VELOCITA PARTICOLARMENTE PER SCALPELLI DA ROCCIA
摘要
申请公布号
IT1160225(B)
申请公布日期
1987.03.04
申请号
IT19830068073
申请日期
1983.10.17
申请人
SMITH INTERNATIONAL INC.
发明人
OELKE ERWIN SIEGFRIED
分类号
E21B10/22;E21B10/25;F16J15/34;(IPC1-7):F16J/
主分类号
E21B10/22
代理机构
代理人
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