国产精品久久久高清免费,chinese国内自拍露脸videos,天天看片网站,久久aaa,97国产婷婷综合在线视频,欧美日韩精品一区二区三区在线观看,免费福利视频网站

The company's products are widely used in medicine, pesticides, dyes, fluorine-containing liquid crystals, intermediates of cured coatings, electrolytes and cosmetics additives, production of fluorine-containing powder coatings, preparation of raw materials for lithium batteries, production of optical raw materials transparent resin, synthesis of polypeptide compounds, preparation of olefin polymerization catalyst, production of OLED raw materials and other fields.