สภ.ประตูน้ำจุฬาลงกรณ์ร่วมบรรยายให้ความรู้ความเข้าใจในเรื่องหมวกกันน็อค กฎจราจร สัญญาณจราจรประเภทต่าง ๆ และวิธีเอาตัวรอดจากการถูกทิ้งไว้ในรถ

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