ส่วนบุคคล, กลุ่ม, เงา, ชาย, หญิง, บทสนทนา, ความร่วมมือ, การทำงานเป็นทีม, ทีม, ร่วมมือกัน, koorparativ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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