It uses specil heat endurable eyeglass and can bear strike ,when it is destoryed by the externai force,it becomes granules with obtuse angles ,which can aviod harming human body.

• 采用强化耐热镜片,耐撞击,当玻璃受外力作用时,成为豆粒大的钝角颗粒,减少对人的损害,具优越的耐热性抗冷性,抗化学性及抗溶解行等特性