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Korea PTG PTMEG 650 polytetrahydrofuran ether/polytetramethyl ether glycol PTMEG650 molecular weight 25190-06-1
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Korea PTG PTMEG 650 polytetrahydrofuran ether/polytetramethyl ether glycol PTMEG650 molecular weight 25190-06-1
Korea PTG PTMEG 650 polytetrahydrofuran ether/polytetramethyl ether glycol PTMEG650 molecular weight 25190-06-1
2023-12-06