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发明名称
Pointe articulée pour tubes creux de battage et forage
摘要
申请公布号
FR727890(A)
申请公布日期
1932.06.25
申请号
FRD727890
申请日期
1931.12.05
申请人
发明人
SEBILLON JEAN
分类号
E02D5/72
主分类号
E02D5/72
代理机构
代理人
主权项
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