surface roughness

Abdelkawy, A., M. Hossam, and H. El-Hofy, "Machinability Assessment of Soda Lime Glass in Ultrasonic-Assisted Drilling", Solid State Phenomena, vol. 278, pp. 23-27, 2018.
Abdelkawy, A., M. Hossam, and H. El-Hofy, "Experimental Investigation of Surface and Geometrical Characteristics of Ultrasonic Assisted Drilling of Soda Glass ", Machining Science and Technology, 2018.