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Shock-absorbing helmet for protection of cyclist or motorcyclist against head injury is made of thick layer of open-pore metal foam
Shock-absorbing helmet for protection of cyclist or motorcyclist against head injury is made of thick layer of open-pore metal foam
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机译:用于保护骑车人或摩托车手免受头部伤害的减震头盔由厚层的开孔金属泡沫制成
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摘要
The helmet surrounds the top, sides and back or the rider's head. It has an aperture at the front which may be covered by a visor. A band passes in front of the rider's chin. The helmet shell is made of a thick layer of open pore metal foam.
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