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发明名称
Outil de forage.
摘要
申请公布号
CH304936(A)
申请公布日期
1955.01.31
申请号
CHD304936
申请日期
1952.12.05
申请人
DIONISOTTI,JOSEPH
发明人
DIONISOTTI,JOSEPH
分类号
E21B4/00;E21B31/00
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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