ปลอดภัยไว้ก่อน, ป้ายถนน, โล่, ความปลอดภัย, การป้องกัน, การเตือน, สัญลักษณ์, ไอคอน
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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