| 单词 | borehole survey | 
| 释义 | borehole survey [`bȯr´hōl ´sǝr·vā]  ENGINEERING 1. Also known as drill-hole survey.  2. Determining the course of and the target point reached by a borehole, using an azimuth-and-dip recording apparatus small enough to be lowered into a borehole.  3. The record of the information thereby obtained.  | 
	
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