สนับสนุน, ช่วยด้วย, สกปรก, คณะกรรมการ, ถอยหลัง, ความช่วยเหลือ, การมีส่วนร่วม, ช่วยให้ประสิทธิภาพ, การดูแล, ช่วยเหลือ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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