00694naa#a2200169#i#450# EN\\bibl\97886 20250607073342.6 2686-9896 20250428b2025####ek#y0engy0150####ca RU DEPENDENCE OF THE COST OF STEEL AIR DUCTS ON THE DIAMETER Journal article Angarsk Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University» 2025 1 с. Journal article local Санитарная техника. Санитарно-технические сооружения. Водоснабжение. 628 Kuz'min Sergey Ivanovich angtu.editorum.ru