Experience of Development, mplementation and Modernization of Hot Water Supply Boilers with Dual-Screens and the Slot Bottom Burners - Ye. M. Lavrentsov; Ya. Sihal; A. V. Smikhula; E. P. Dombrovska; O. S. Kernazhytska; O. V. Marasin (Energy Technologies and Resource Saving, 2019)