สัญญาณ, ป้ายถนน, ถนน, เรียน, การศึกษา, ต้นไม้, สาขา, การอบรม, ศึกษา
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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