freehdxxxxmoviesvideo国产|www..com18午夜观看|亚洲成av人片一区二区梦乃|色戒韩国免费完整版在线观看,99人人爽,欧美一区二区三区四区在线观看,完美证据在线电视剧免费观看全集

您的瀏覽器版本太低,將不能正常瀏覽。請升級 Internet Explorer或使用Google Chrome瀏覽器。
如果您在使用雙核瀏覽器,請切換到高速 / 極速 / 神速 核心。
Crude Benzene
Product
2020-03-26
Crude Benzene
The quality of crude benzene meets the requirements of national standards and the production license for hazardous chemicals has been obtained.
Quality standards are shown below:
Appearance   Yellow transparent liquid
Density   0.871-0.900
Prior to 75℃(%)  
Prior to 180℃ (%)      93
96% (soluble)is distilled at  
Moisture   No visible insoluble in water by visual inspection at room temperature (18-25℃)