หอคอย, ผู้ปฏิบัติงาน, ท้องฟ้า, กำลังขึ้นไป, วิศวกร, งาน, โครงสร้าง, อุตสาหกรรม, ดวงอาทิตย์, แสงแดด, เมฆ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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