这款产品使用医用级高分子聚合物以保证其舒适性和安全性。 产品尺寸为90毫米长x 43毫米宽。
Made from a medical grade Polymer that ensures a comfortable and secure fit, dimensions are 90mm long x 43mm wide.
悬停无人机不会为有效地飞的，因为它们更短的转子叶片的直升机，但其封闭转子有一个更小的尺寸和安全性人类接近的优势。
The hovering drones would not fly as efficiently as helicopters because of their shorter rotor blades, but their enclosed rotors have the advantage of a much smaller size and safety near humans.
在同样的人员负荷、人员密度和人员初始期望速度情况下，空间几何尺寸对人员流动安全性有一定的影响。
It showed that space dimension could have a lot of influence on the safety evacuation performance of buildings based on the same crowd density load and the same initial expected velocity.
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