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basic exploratory line
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expl.
basic exploratory line
基本勘探线
为全面揭露地质情况,按勘探规范对勘探线间距的要求布置的勘探线
expl.
spacing of
basic exploratory line
基本线距
按勘探区内构造复杂程度和煤层稳定性所确定的基本勘探线之间的距离
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