矿井内的气体状况每半小时就取样一次，救援人员说，他们需要一个持续下降的趋势，专业救援小组才能进入矿井。
Samples of gas conditions in the mine are being taken every half hour and rescuers say they need a sustained downward trend before specialist rescue teams could enter.
在矿井火灾灾变时期，井巷可通行性主要根据巷道内是否具有高温有毒有害气体而确定。
Fire hazard travel ability of shaft and roadway mainly depends on whether or not there are high temperature toxic gases in the roadway conditions.
在矿井火灾灾变时期，井巷可通行性主要根据巷道内是否具有高温有毒有害气体而确定。
Fire hazard travel ability of shaft and roadway mainly depends on whether or not there are high temperature toxic gases in the roadway conditions.
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