Polyurethane

Los ntawm kev siv cov khoom lag luam txawv teb chaws, peb cov khoom muaj cov yam ntxwv zoo hauv qab no: cov qauv ruaj khov, lub sijhawm khaws cia ntev, cov duab zoo, zoo siab thiab muaj peev xwm ntawm lub cev zoo.

Peb lub tuam txhab tau kos npe rau daim ntawv cog lus mus sij hawm ntev nrog cov neeg sawv cev ntawm cov khoom siv raw khoom hauv qab no hauv Suav teb, txhawm rau ua kom peb cov khoom zoo.

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