’discrete’and ’continuous’survey
1∶250 000 regional geological survey
1∶50 000 regional geological survey
2002 National Nutrition and Health Survey
250000 Regional Geological Survey
250000 scale regional geological survey
3 point- 3 poles lead survey method
36-Item Short Form Health Survey
3-component seismic survey
3D borehole-surface resistivity survey
3D control survey network
3-D direct current survey
救护飞机(Airam bulances)
三维直流电法