เบา, กระเปาะ, สีเหลือง, พลังงาน, ความคิด, โคมไฟ, เทคโนโลยี, ไฟฟ้า, หลอดไฟฟ้า, คิด, แสง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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