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发明名称
IMPROVED ORIENTATION DEVICE
摘要
申请公布号
ZA7100905(B)
申请公布日期
1971.11.24
申请号
ZA19710000905
申请日期
1971.02.12
申请人
WESTERN MINING CORP LTD
发明人
MCINERNEY E
分类号
E21B
主分类号
E21B
代理机构
代理人
主权项
地址
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