การประชุม, พูดคุย, การบันเทิง, ด้วยกัน, ความร่วมมือ, ส่วนบุคคล, ธุรกิจ, การระดมสมอง, ร่วมมือกัน
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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