biohazard sign symbol warning black yellow triangle signage macro gray metal wall |
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| navigate by keyword : aged backdrop background banner biohazard biologic biological black brick cement closeup contamination design dirty environment forbidden frame graffiti graphic gray grunge hazardous industrial label macro material metal old pattern poison poster prohibition restricted risk rough rusty sign signage slate stone substance symbol texture threat tile toxic triangle urban vintage wall wallpaper warn warning yellow |
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| Biohazard sign symbol biohazard warning, black yellow triangle signage macro on gray metal wall. |
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