?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Rahmad%2C+Drefsyah+Ramadhani&rft.aufirst=Drefsyah+Ramadhani&rft.aulast=Rahmad&rft.date=29+October+2025&rft.title=Perancangan+Sand+Blasting+Machine&rft.inst=Universitas+Negeri+Padang&rft.degree=Diploma%2FProyek+Akhir