Ключевые слова:
Safety devices, Steels, Safety valves, Volume, Pressure testing, Mathematical calculations, Copper alloys, Hydraulic tests, Hot-water boilers, Pipework systems, Flow rates, Thermodynamic properties, Steam boilers, Marking, Flow measurement, Grey cast-iron, Relief valves, Helical springs, Valves, Design, Type testing, Boilers, Flow, Pressure equipment, Steam heaters, Springs, Installation, Performance testing