Search History Select to load keywords (subject equals "Polyethylene") AND (subject equals "Maleic anhydride") AND (subject equals "โพลิเอทิลีน") AND (subject equals "Rubber") AND (subject equals "Copolymers") AND (author equals "Pornpirom Moteplay") AND (subject equals "ยาง") (subject equals "Methane") AND (subject equals "มีเทน") AND (dateIssued equals "[1999 TO 1999]") AND (subject equals "Catalysts") AND (dateIssued equals "1999") AND (subject equals "คาร์บอนไดออกไซด์")
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