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发明名称
METHOD OF DETERMINING THE COMPASS OF WATER INFILTRATION AROUND A WATERING BOREHOLE
摘要
申请公布号
PL135981(B1)
申请公布日期
1986.01.31
申请号
PL19820236594
申请日期
1982.05.24
申请人
发明人
分类号
E21C39/00;E21F;G01N;G01N33/24;(IPC1-7):E21C39/00
主分类号
E21C39/00
代理机构
代理人
主权项
地址
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