Search History Select to load keywords (subject equals "Polyethylene") AND (subject equals "โพลิเอทิลีน") AND (subject equals "ตัวเร่งปฏิกิริยา") AND (dateIssued equals "1998") AND (subject equals "Hexane") AND (subject equals "Polymerization") (subject equals "Polymerization") AND (dateIssued equals "[1998 TO 1999]") AND (author equals "Chalermphol Wongdithnan") AND (subject equals "โพลิเมอไรเซชัน") AND (dateIssued equals "1999") AND (subject equals "Ethylene")
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