For citations:
Joldassov S.К., Abildaev S.T., Tattibaev S.J. ON METHODS FOR DETERMINING THE ROUGHNESS COEFFICIENT OF CHANNELS ALONG THE PERIMETER. Herald of the Kazakh-British technical university. 2023;20(3):76-88. https://doi.org/10.55452/1998-6688-2023-20-3-76-88