The activity concentration of 40k is lower than all corresponding values in other countries.
40k的活度浓度低于所有其他国家的相应值。
Evacuation is quite difficult for a large-scale supermarket when fires happen because of the personnel activity concentration, bigger fire density and further dispersing distance.
某大型超市具有人员活动集中、火灾荷载密度较大以及疏散距离超长等特点，需要重视消防设计和安全分析。
Evacuation is quite difficult for a large-scale supermarket when fires happen because of the personnel activity concentration, bigger fire density and further dispersing distance.
某大型超市具有人员活动集中、火灾荷载密度较大以及疏散距离超长等特点，需要重视消防设计和安全分析。
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