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发明名称
Doppelmantel-Bohrgestaenge fuer Spueldrehbohrverfahren
摘要
申请公布号
DE1177580(B)
申请公布日期
1964.09.10
申请号
DE1959C019818
申请日期
1959.09.17
申请人
ITALO COSTA
发明人
COSTA ITALO
分类号
E21B17/042;E21B21/12;F16L39/00
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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