ตอม่อ, สายฟ้า, เรือ, โลหะ, เหล็ก, สนิม, ความแข็งแรง, แข็งแรง, ประโยชน์, อุตสาหกรรม, เครื่องมือ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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