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发明名称
FREMGANGSMAATE OG INNRETNING FOR AVBOEYD NEDDRIVNING AV ET ROERLEDNINGSBROENNROER
摘要
申请公布号
NO803873(A)
申请公布日期
1982.06.21
申请号
NO19800003873
申请日期
1980.12.19
申请人
PETRO-DRIVE, INC.,
发明人
HIPP, JAMES,
分类号
E21B;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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