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发明名称
Устройство для бурения или перемещения под землей
摘要
申请公布号
SU69855(A1)
申请公布日期
1946.11.30
申请号
SU19450336949
申请日期
1945.03.12
申请人
TREBELEV A.I.
发明人
TREBELEV A.I.
分类号
E21B4/04
主分类号
E21B4/04
代理机构
代理人
主权项
地址
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