Opanga amawongolera mpweya wambiri wa sulfure wapamwamba kwambiri wa graphitized petroleum coke, kukula kwa 1-5mm.
Factory mwachindunji kugulitsa
Mzere wopanga
Zida zamakono
Gulu lodziwa zambiri
Kasamalidwe kabwino kwambiri
Kutumiza mwachangu
Zabwino pambuyo-kugulitsa ntchito