Design Of a Dry Coffee Bean Shell Separation Machine Model To Increase Productivity I Ketut Gde Juli Suarbawa, A.A. Ngurah Bagus Mulawarman and I Gede Oka Pujihadi SHS Web Conf., 189 (2024) 01028 Published online: 09 April 2024 DOI: 10.1051/shsconf/202418901028