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BS 5991:1983

Заменен
Specification for indirect gas fired forced convection air heaters for space heating (60 kW up to 2 MW input): safety and performance requirements (excluding electrical requirements) (2nd family gases) — 32 стр.
BS 3561:1962
Заменен
BS 5991:1983
Заменен
BS 5991:1989
Заменен
BS 5991:2006
Действует