Ключевые слова:
Mechanical testing|Stop valves|Design|Damp-heat tests|1st family gases|Thermal-cycling tests|Fire resistance|Leak tests|Performance testing|Endurance testing|2nd family gases|Bend testing|Test equipment|Testing conditions|Safety valves|Service pressure|Manually-operated devices|3rd family gases|Plug valves|Gas valves|Scratch tests|Marking|Performance|Valves