detecting water by pilot hole
超前探水钻孔 [矿业] cover hole
超前钻孔探水 exploitation water of advanced drilling
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系统阐述了红外线超前探水的原理，测线布置方式，和超前探水预报判读依据；
The principle, measure line layout style, and criterion of infrared ray predicting water method are expounded in paper;
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