การทดลอง, วิจัย, ห้องปฏิบัติการ, วิทยาศาสตร์, ปลูก, จีเอ็มโอ, เคมี, ชีววิทยา, ขวดเล็ก, สารเคมี, ถ้วยแก้ว
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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