萨戈矿难后，联邦通过法规，加强了对作业段和密封段内空气质量的监测，以避免甲烷聚集。
Federal regulations passed after the Sago disaster increased the monitoring of air quality in active and sealed sections of the mines to avoid methane build up.
萨戈矿难后，联邦通过法规，加强了对作业段和密封段内空气质量的监测，以避免甲烷聚集。
Federal regulations passed after the Sago disaster increased the monitoring of air quality in active and sealed sections of the mines to avoid methane build up.
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