27.060.20 Gas fuel burners / Газовые горелки, 91.140.40 Gas. Including gas meters in buildings / Системы газоснабжения
Ключевые слова:
Pressure|Classification systems|Calorific value|Fuels|Testing conditions|Gas-powered devices|3rd family gases|Gaseous fuels|2nd family gases|Control samples|Test pressure|1st family gases