Ethylene oxide-polytetramethylene glycol-propylene oxide-tetrahydrofuran copolymer Ethylene oxide-propylene oxide-Terathane 650 copolymer Ethylene oxide-propylene oxide-tetrahydrofuran copolymer Ethylene oxide-propylene oxide-THF copolymer Ethylene oxide, polymer with propylene oxide and tetrahydrofuran Furan, tetrahydro-, polymer with 2-methyloxirane and oxirane Furan, tetrahydro-, polymer with ethylene oxide and propylene oxide Furan, tetrahydro-, polymer with methyloxirane and oxirane Methyloxirane-oxirane-tetrahydrofuran copolymer Oxirane, methyl-, polymer with oxirane and tetrahydrofuran Oxirane, polymer with methyloxirane and tetrahydrofuran Propylene oxide, polymer with ethylene oxide and tetrahydrofuran