วิทยาศาสตร์, การศึกษา, เส้นขยุกขยิก, พื้นหลัง, อุปกรณ์วิทยาศาสตร์, ห้องปฏิบัติการ, แปลก, วาดด้วยมือ, แว่นขยาย, ดาว, ลูกศร
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