⑶We can draw the conclusion from the result of SF6 tracer gas experiment that sampling data attenuated submitting negative exponent regular with time, which were alike among all holes.
⑶SF6示踪气体试验结果表明,各个钻孔取样数据随着时间变化的衰减趋势基本一致,主要呈负指数形式衰减。
参考来源 - 地面钻孔抽采条件下半封闭采空区瓦斯运移及分布规律研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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