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Minefield warning sign ukrainean text “Danger Mines!” placed near a marked safe lane during humanitarian demining operations in Ukraine. A radio and protective gloves are placed on the sign, Wooden stakes mark the safe path and hazardous zones
road closure construction barricade sign with bright orange caution flags
No smoking sign on a pillar inside an underground train station in Europe. Selective focus, no people.
Zona de perigo de tsunami, Caminho De Evacuacao (Tsunami Hazard Zone, Evacuation Route) warning sign in Portuguese and English language warn the public about possible danger after an earthquake.
Road closed at construction site with protective fence barrier

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