Ключевые слова:
Rigidity, Mechanical testing, Restraint systems (protective), Sports equipment, Marking, Penetration tests, Helmets (protective), Drop tests, Eye protectors, Optical properties of materials, Face shields, Artificial ageing tests, Ageing (materials), Test equipment, Winter sports equipment, Instructions for use, Optical measurement, Mass, Design, Specimen preparation, Field of vision, Testing conditions, Shock-absorbing materials, Impact testing, Performance