... of plants.Impact resistance: With the strength as10 times of the ordinary glass, 3-5 times as the PMMA sheet, it has less risk ... ,yard,airport,bus shelter;• Roofing/wall of fctory building,warehouse,family house;• Roofing/wall of business buildings;• Part of machine, electron ... screws for fixing,the hole must be pre-drilled, the aperture should be 1,5 times larger than the diamenter of the screw, it is ...