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เพ็ชร์ยิ้ม ณ. Recovery of Lube Base Oil from Used Lubricant Oil by Mixed Solvent Extraction. j.eng.rmutt [Internet]. 2017 Jun. 30 [cited 2024 May 7];15(1):9-14. Available from: https://ph01.tci-thaijo.org/index.php/jermutt/article/view/241994