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发明名称
SUB-SOIL NATURE DETERMINING METHOD
摘要
申请公布号
CA344586(A)
申请公布日期
1934.09.11
申请号
CAD344586
申请日期
申请人
MASON, SLICHTER AND HAY
发明人
DONALD L. HAY
分类号
主分类号
代理机构
代理人
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