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经营范围
发明名称
SURFACE HARDENING OF DRILL ROD COUPLINGS WITH A LASER
摘要
申请公布号
AU576383(B2)
申请公布日期
1988.08.25
申请号
AU19850046906
申请日期
1985.08.30
申请人
SAIPEM S.P.A.
发明人
NICOLANGELO SIGNORI
分类号
E21B17/00;C21D1/09;C21D9/00;C21D9/14;C21D9/22;(IPC1-7):E21B17/10;C21D1/38;C21D1/42
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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