Hom Tshuaj: C1144

Dawb Txiav Hlau Rau Kev Siv

Siv raws li tig hlau, siv dav hauv cov txheej txheem.

Cov pa roj carbon C: 0.40 ~ 0.48

Silicon Si: 0.15 ~ 0.35

P: ≤0.040

Sulphur S: 0.24 ~ 0.33

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