Ключевые слова:
Helmets (protective), Cyclists helmets, Protective clothing, Headwear, Sports equipment, Roller skates, Skateboards, Design, Field of vision, Straps, Strength of materials, Quick-release mechanisms, Safety devices, Durability, Performance, Marking, Colour, Instructions for use, Inspection, Performance testing, Impact testing, Drop tests, Mechanical testing, Ageing tests, Artificial ageing tests, Specimen preparation, Testing conditions, Test equipment