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ฝ.๑.๒๑/ผ.๒๑
4. 6, 12, 18
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5. 4, 9, 12
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6. 10, 20, 30, 60
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์
ส ถ า บั น ส ง เ ส ริ ม ก า ร ส อ น วิ ท ย า ศ า ส ต ร แ ล ะ เ ท ค โนโ ล ยี ( ส ส ว ท . )
่
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