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Cov kab ua haujlwm rau cov khoom siv roj teeb
Daim ntawv thov:Cov kab ua haujlwm feem ntau yog siv rau hauv crushing kev faib tawm ntawm cov khoom siv roj teeb zoo thiab tsis zoo electrode. Nws tseem tuaj yeem siv rau hauv Mosh lub hardness hauv qab 4 cov khoom siv tshuaj lom neeg, khoom noj khoom haus, kev lag luam uas tsis yog ntxhia thiab lwm yam.
