“Machining Constraint Analysis of CNC Turning in the Manufacturing Process of Titanium Ti-6Al-4V ELI Bone Screw Implants: Analisis Kendala Pemesinan CNC Turning pada Proses Manufaktur Implan Bone Screw Material Titanium Ti-6Al-4V ELI” (2026) Procedia of Engineering and Life Science, 10(1), pp. 128–135. doi:10.21070/pels.v10i1.3150.