Search History Select to load keywords (dateIssued equals "[1996 TO 1999]") AND (subject equals "Ethylene") AND (subject equals "ตัวเร่งปฏิกิริยาซิเกลอร์แนตทา") AND (subject equals "เอทิลีน") (dateIssued equals "[2500 TO 2566]") AND (dateIssued equals "[2520 TO 2529]") AND (subject equals "การฝึกสอน") AND (author equals "นาฏยา อุกฤษฏ์ดุษฎี")
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