Ramdan, Raden Dadan, Budi Prawara, Rochim Suratman, Ferdian Marta, and Ali Rinaldi. 2017. “The Effect of Substrate Pre-Treatment on Hydroxy-Apatite Coated Titanium Alloy by High-Velocity Oxy-Fuel Process”. MECHANICAL ; Jurnal Ilmiah Teknik Mesin 8 (1):1-5. https://doi.org/10.23960/mech.v8i1.580.