Galvanized nto, siab ci ci, muaj zog tiv thaiv corrosion.
Carburize tempering kev kho mob, siab nto ntawm cov tawv tawv.
Cov thev naus laus zis siab, muaj xauv zoo.
Galvanized nto, siab ci ci, muaj zog tiv thaiv corrosion.
Carburize tempering kev kho mob, siab nto ntawm cov tawv tawv.
Cov thev naus laus zis siab, muaj xauv zoo.