00688naa#a2200169#i#450# EN\\bibl\20156 20260628181736.7 20260625b2026####ek#y0engy0150####ca RU Preserving Teaching Traditions Conference article/thesis Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2026 3 с. Conference article/thesis local Санитарная техника. Санитарно-технические сооружения. Водоснабжение. 628 Chernikov Nikolay Andreevich Tvardovskaya Nadezhda Vladimirovna itt-pgups.ru