● Papermaking kev lag luam muaj cov yam ntxwv ntawm cov peev txheej thiab thev naus laus zis, cov txiaj ntsig zoo kawg li, muaj kev sib raug zoo ntawm kev lag luam thiab kev lag luam loj.Nyob rau hauv tag nrho cov khoom ntawm cov ntawv, ntau dua 80% raws li cov ntaub ntawv tsim khoom siv hauv xov xwm, tshaj tawm, luam ntawv, cov khoom ntim khoom ...
Nyeem ntxiv