... 地下铁道测量subway survey 地下铁道测量underground railway survey 地下油库测量underground oil depot survey ...
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From Shenmu to Daliuta section along Shensuo railway, we set up 6 survey lines in order to understand the condition of underground coal pit and tunnel.
在神朔铁道神木至大柳塔段，为了解地下煤窑空洞与隧道情况，布设了6条测线，共计388个测点，进行了地磁总强度观测工作。
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