folding retractable fence on casters. barrier on casters. sliding gates on rollers. pedestrian barrier. barricade gate. lockdown

area automatic barricade barrier building casters concept contemporary corona coronavirus covid19 design desk disease entrance equipment fence flu folding gate gates guard illness industrial industry infect infection interior lockdown medical metal modern outbreak outdoor passenger pattern pedestrian perspective pneumonia portable protect protection quarantine retractable rollers safe safety security shutdown sign sliding space stainless steel travel virus warning