Tungsten steel ncig Hniav

Tungsten steel ncig saw hniav muaj ntau qhov zoo vim lawv cov khoom tshwj xeeb thiab muaj pes tsawg leeg. Qee qhov txiaj ntsig tseem ceeb suav nrog:

1. Siab hardness

2. Hnav tsis kam

3. Precision txiav

4. Ntau yam

5. Txo kev txij nkawm

6. Kev sib haum xeeb