00642naa#a2200181#i#450# EN\\bibl\119587 20260407212530.2 2223-9987 20260403b2026####ek#y0engy0150####ca RU Improvement of gearbox housings for unequipped electric rolling stock Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2026 10 с. Journal article local Электрическая тяга. 621.33 Oparina Ekaterina Vladimirovna Kolotay Dmitriy Anatol'evich atjournal.ru