Blok BKPU-20 "SKIF-M20" sistemasynyn kuushunda 81-775 modelindegi metropolitenin bashtuu vagonynda ornootulgan.
Blok BKPU-20 quyidagi funktsiyalardy atkarat:
- poizdnyn kolgochtoyu janalik rezhimderinde bashkarmak;
- vagondordun koshumcha qurulmalary men jihezdin bashkarmasy.
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