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发明名称
BEAM-GRIPPING DEVICE FOR SKIDDING MASSIVE OBJECTS,E.G. DRILLING RIGS
摘要
申请公布号
GB2225995(A)
申请公布日期
1990.06.20
申请号
GB19890025331
申请日期
1989.11.09
申请人
* DRECO INC
发明人
ROBERT BENJAMIN * DONNALLY
分类号
B66F1/02;E21B15/00
主分类号
B66F1/02
代理机构
代理人
主权项
地址
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