reaserch design

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โ€ซืžื˜ืคืœื™ื ื‘ืขืœ ื›ื•ืจื—ืโ€ฌ

โ€ซืžื—ืงืจ ืขื™ืฆื•ื‘ โ€ช Iโ€ฌืชื•ืืจ ืฉื ื™ ืขื™ืฆื•ื‘ ืชืขืฉื™ื™ืชื™ ื‘ืฆืœืืœโ€ฌ โ€ซื‘ื”ื ื—ื™ื™ืชโ€ช :โ€ฌื ื™ื ื” ืคืจืงืฉ ื•ืžื•ืจืŸ ื–ืจื—ื™โ€ฌ

โ€ซื™ื•ื ื™ โ€ช2021โ€ฌโ€ฌ


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