The focal point to bound the conception of public security disaster accident is that whether or not it includes conflagration, explosion, and poison which are made by criminals on purpose.
治安灾害事故是否包括犯罪分子故意制造的火灾、爆炸、投毒等灾祸，一直是界定这个概念的焦点。
The network is widely used in transportation, meteorology, disaster forecasting, construction, telecommunications and public security.
该网络现已被广泛运用在交通、气象、灾害预测、建筑、电信以及公共安全等领域。
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