黄色的毛片免费,日本乱淫一区二区三区,爆操清纯美女,日本a在线看,国产黄色av免费,高柳の肉嫁动漫,久久综合88中文色鬼

Our products are:
1. Ceramic glass with the thermal expansion 0-10 and thermal shock 650-700.
2. Borosilicate glass pressed glasses such as reflectors, lens something others with the thermal expansion coefficient 33-48.
3 Process glass discs and sheets: edges step, straight and round ground, thermally tempered
The min.thickness 1mm
The max.thickness 15mm