It vastly used for the traffic warning of road & bridge construction, municipal construction, fire-fighting, and parking lots.
用于路桥施工作业，市政建设，消防抢险，停车场，等交通警示作用。
It vastly used for the traffic warning of road & bridge construction, municipal construction, fire-fighting, and parking lots.
用于路桥施工作业，市政建设，消防抢险，停车场，等交通警示作用。
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