Cov txheej txheem thev naus laus zis ntawm sab hauv tsev wood wood

Kev tiv thaiv ib puag ncig: Tsis muaj kua nplaum yog yuav tsum tau nyob rau hauv tag nrho cov txheej txheem ntau lawm, Benzene tawm thiab Benzene raug tso tawm, thiab nws ua tau raws li cov qauv kev tiv thaiv sab hauv ib puag ncig.
Yuav tsum muaj cov khoom siv: yuav tsum muaj extruder tshwj xeeb, cov ntsia hlau yog hnav-resistant thiab muaj txoj haujlwm ntawm cov dej ntws tawm kom tsis txhob muaj kev tso dej noo cuam tshuam.
Cov ntaub ntawv piv: Qhov sib piv ntawm cov ntoo hmoov rau cov yas yog feem ntau 3: 7 txog 5: 5. Dhau ib tug ntoo hmoov ntoo cov ntsiab lus tuaj yeem yooj yim coj mus rau kev nce siab.