00601naa#a2200169#i#450# EN\\bibl\34700 20250502180320.5 2686-9896 20190415b2019####ek#y0engy0150####ca RU THE INFLUENCE OF ELECTRICAL EQUIHMENT IN THE COAL MINE JF VIETNAM ON THE QUALITY OF ELECTRICITY Journal article Angarsk Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University» 2019 1 с. Journal article local Buy Ngok Hung Ha Thi Chuk angtu.editorum.ru