Ключевые слова:
Flow rates|Mechanical testing|Gas-resistance tests|Formulae (mathematics)|Performance testing|Instructions for use|Pressure|Valves|Grades (quality)|Durability|Temperature|Leak tests|Scratch tests|Gas valves|Testing conditions|Flow regulators|Performance|Bend testing|Torsion testing|Pressure regulators|Marking|Ratings|Seals|Size