Salam kenal, IGN: Azwyg ane sering nongkrong di ch4. add ane ya gan. ane aktif kok ngasih gift :cendols
gan request e-book kimia dong gan: Chemichal Process Principle pengarang: Hougan Elementary principles of chemical processes pengarang: Richard Felder Basic Principal and Calculation in Chemical Engineering pengarang: David M. Himmelblau thank you gan :kiss