Yohanes, Yohanes, AND 		Alqolbi, Muhammad.
" Development of Dynamometer Based on Strain Gauge with Sensor Rod Type Four Square Stalk to Measuring the Drive Power of  Rotary Friction Welding Machine" <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], Volume 64 Number 1 (30 March 2020)