Raws li kev sib txawv ntawm cov txheej txheem melting, hom rauv thiab qhov cub melting loj, nws tseem ceeb heev uas yuav tau xaiv qhov tsim nyog carburizer particle loj, uas tuaj yeem txhim kho qhov nqus thiab nqus tus nqi ntawm cov kua hlau rau carburizer, tsis txhob oxidation thiab hlawv ntawm carb. ..
Nyeem ntxiv