Ключевые слова:
Locks, Ironmongery (buildings), Crime prevention devices, Keys, Performance, Grades (quality), Strength of materials, Life (durability), Corrosion resistance, Classification systems, Environment (working), Fire resistance, Performance testing, Approval testing, Acceptance (approval), Endurance testing, Torque, Mechanical testing, Thermal testing, Heating tests, Corrosion tests, Marking, Lock cylinders