Dab tsi yog qhov tseem ceeb ntawm zinc?
- noj qab haus huv
Dab tsi yog qhov tseem ceeb ntawm zinc hauv lub cev?
Dab tsi yog qhov tseem ceeb ntawm zinc hauv lub cev 1- Tshem tawm pob txuv thiab pob txuv 2- Pab pob txha ntxiv dag zog 3- Txo cov tsos mob ntawm…
Nyeem ntxiv »