Results of research tests of the IUM-1 hydrostatic level gauge 04.05.202015.11.2003 by Светлана Малахатко N. A. Grekov, V. I. Zaburdaev, A.V. Klimenko, A. N. Logvinchuk, V. Zh. Mishurov, M. N. Penkov Full text in PDF(RUS)