บทคัดย่อ, กระจก, ทำให้, ลวด, โครงลวด, กรง, สีเขียว, เส้น, ส่วนประกอบ, แบบ, พื้นหลัง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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