The secret of the transformation between clear or translucent glass is found in the liquid crystal sheet 清晰可見及半透明的秘密可以在液晶體薄片找到
Glass in building - fire resistant glazed elements with transparent or translucent glass products - classification of fire resistance 建筑用玻璃.帶透明或半透明玻璃制品的耐火上釉元件.耐火性分級(jí)