Report copyright - autocad123.vn · 2019-11-07 · trong nó c6 cacbon, mangan tù 1 dCn 2%, còn silic thì düái 1%. Sü du;lng thép cüòng dê khá cao, có thd tiSt kiêm vat lieu 20 — 25%
Please pass captcha verification before submit form
Please pass captcha verification before submit form