Waste materials such as charcoal collected from candle flames shall not be discarded so only. In fact they recycle coal produced and used as ink for writing. Ink that is produced from the best type (Aktuglu, Altin, Tanac Kiray, Yilmaz Karaman, Secer, Bozdag, & Kahraman, 2007).
Sedang diterjemahkan, harap tunggu..
