WEI, Z.; ZHANG, H.; GONG, J.; QIANG, Y.; YUSUF, F. M. APPROACH TO ADJUSTING LAMPS’ HEIGHTS AND ANGLES: DESIGN AND IMPLEMENTATION OF AN ELEVATING DEVICE FOR ILLUMINATION IN SLEDGE TESTS. Journal of Engineering Studies and Research, v. 28, n. 1, p. 81-89, 23 Jun. 2022.