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发明名称
GROUND WAVE VELOCITY DETERMING METHOD
摘要
申请公布号
CA400592(A)
申请公布日期
1941.11.11
申请号
CAD400592
申请日期
申请人
BOLIDENS GRUVAKTIEBOLAG
发明人
JOHAN DAVID MALMQVIST
分类号
主分类号
代理机构
代理人
主权项
地址
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