Riky Stepanus Situmorang; Novin Haritsyah; James Haryanto; Hendrik Voice Sihombing. Impact of Abrasive Material, Spraying Pressure, and Nozzle Angle on Roughness of ASTM A36 Steel in Sandblasting Processes. Appl. Chem. Eng. 2026, 9, ACE-5924.