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2019-09-30: Characteristics of Tairus Hydrothermally-Grown Synthetic Ruby and Blue Sapphire
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นางนันทวัลย์ ศกุนตนาค
อดีตปลัดกระทรวงพาณิชย์
(29 มิ.ย. 2564 - ปัจจุบัน)
Email: rphusit@git.or.th
Tel: 0-2634-4999 633
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