00831naa#a2200193#i#450# EN\\bibl\63900 20240503175740.5 2686-9896 20230504b2023####ek#y0engy0150####ca RU ANALYSIS OF THE EFFECT OF RELATIVE ROUGHNESS OF PIPELINES ON THE HEAD LOSS Journal article Angarsk Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University» 2023 1 с. Journal article local Общее машиностроение. Ядерная техника. Электротехника. Технология машиностроения в целом. 621 Litvincev Yuriy Igorevich Kozyrev Arseny Alexeevich Zhuko Ivan Olegovich angtu.editorum.ru