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Harwin Saptoadi * Corresponding Author Dept. of Mechanical Engineering & Research Center for Engineering Science
P. C. Sumardi Department of Chemical Engineering Gadjah Mada University Jl. Grafika2. Jogyakarta 55284
Suhanan Suhanan Department of Chemical Engineering Gadjah Mada University Jl. Grafika2. Jogyakarta 55284