Search History Select to load keywords (dateIssued equals "[1996 TO 1999]") AND (subject equals "Ethylene") AND (subject equals "เอทิลีน") AND (subject equals "ตัวเร่งปฏิกิริยาเมทัลโลซีน") (subject equals "Methane") AND (dateIssued equals "[2010 TO 2020]") AND (dateIssued equals "2015") AND (subject equals "มีเทน")
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