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Haruyama, S. , Nurhadiyanto, D. , Choiron, M. , Kaminishi, K.. "Surface Roughness of Flange Contact to the 25A-size Metal Gasket by using FEM Simulation". World Academy of Science, Engineering and Technology, Open Science Index 74, International Journal of Mechanical and Mechatronics Engineering, (2013), 7(2), 272 - 276.