Transformers; three-phase oil immersed transformers with off-circuit tap-changer or with on-load tap-changer 12500 to 80000 kVA for 50 Hz and U<(Index)m> up to 123 kV; requirements and accessories— 12 стр.
Contract procedures for building works - Part C: General technical specifications for building works; Systems for heating and central water heating— 21 стр.