Tri-pov thawj lub teeb suav nrog peb lub zog ntawm cov dej tsis zoo, plua plav pov thawj thiab tiv thaiv corrosion.Nws yog feem ntau haum rau cov teeb pom kev zoo ntawm cov chaw teeb pom kev zoo uas muaj zog corrosiveness, plua plav thiab nag, xws li cov chaw tsim khoom noj khoom haus, txias cia, nqaij ua cov nroj tsuag, khw muag khoom thiab lwm qhov chaw.Qhov chaw...
Nyeem ntxiv