ความสูง, ผู้ปฏิบัติงาน, การทำความสะอาด, เทียม, หอคอย, โครงสร้าง, ตึกระฟ้า, งาน
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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