It is being incorporated into various things - from protective sportswear, shin pads and motorcycle clothing, to police body armour.

它可以用来制作多种用品，从防护型运动装、护腿板、摩托车服，到警用防弹衣等等。

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It was the fatal stabbing of another London police officer, in 1985, that led to the development of body armour.

BBC: Concern over rising police deaths