vinylidene造句
tetrafluoroethylene-vinylidenefluoridecopolymerchlorotrifluoroethylene-vinylidenefluoridecopolymervinylidenechloride-vinylchloridecopolymervinylchloride-vinylidenechloridecopolymerResearchonvinylidene...
tetrafluoroethylene-vinylidenefluoridecopolymerchlorotrifluoroethylene-vinylidenefluoridecopolymervinylidenechloride-vinylchloridecopolymervinylchloride-vinylidenechloridecopolymerResearchonvinylidene...