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经营范围
发明名称
INRICHTING VOOR HET METEN VAN DE HELLING VAN HET EIND VAN EEN BOORKOLOM.
摘要
申请公布号
NL7810501(A)
申请公布日期
1979.04.24
申请号
NL19780010501
申请日期
1978.10.20
申请人
BJ-HUGHES, INC. TE LONG BEACH, CALIFORNIEE, VER. ST. V. AM.
发明人
分类号
G01C9/12;E21B47/022;(IPC1-7):E21B47/02
主分类号
G01C9/12
代理机构
代理人
主权项
地址
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