cov khoom

FRP vaj huam sib luag

FRP (tseem hu ua iav fiber reinforced yas, abbreviated li GFRP los yog FRP) yog cov khoom siv tshiab ua los ntawm cov khoom siv hluavtaws thiab iav fiber ntau los ntawm cov txheej txheem sib xyaw.

kev nug nthuav dav