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发明名称
APPARECCHIATURA DI CAROTAGGIO PER PERFORATRICE A PERCUSSIONE
摘要
申请公布号
IT990297(B)
申请公布日期
1975.06.20
申请号
IT19730052126
申请日期
1973.08.22
申请人
TIGRE TIERRA INC
发明人
分类号
E21B4/06;E21B4/14;E21B25/02;(IPC1-7):E21B/
主分类号
E21B4/06
代理机构
代理人
主权项
地址
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ATTACHMENT PLUG
