โรงงาน, สถานที่ก่อสร้าง, ลูกกลิ้ง, การวางแนว, ด้านอุตสาหกรรม, อุตสาหกรรมเหล็ก
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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