สัญญาณ, ทางออก, กรณีฉุกเฉิน, สัญลักษณ์, ทิศทาง, ทาง, สีเขียว, หนี, ประตู, ข้อมูล, ช่วยด้วย
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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