Khoom zoo
1. Galvanized nto, siab ci, muaj zog corrosion kuj.
2. Carburize tempering kho, siab tawv hardness.
3. Kev siv thev naus laus zis siab, kev ua haujlwm siab xauv.
Khoom siv
Feem ntau siv rau hauv qhov rooj, qhov rais, kho kom zoo nkauj thiab kev sib txuas ntawm ntau yam hlau.
Cov khoom ntim

Sau koj cov lus ntawm no thiab xa tuaj rau peb