色噜噜亚洲精品中文字幕_性刺激的大陆三级视频_精品人妻少妇一区二区三区在线_亚洲成a∨人片在线观看无码_成人午夜福利视频

您的瀏覽器版本太低，將不能正常瀏覽。請(qǐng)升級(jí) Internet Explorer或使用Google Chrome瀏覽器。
如果您在使用雙核瀏覽器，請(qǐng)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℃)