国产色啪午夜免费视频_日韩一级性生活片_精品 日韩 亚洲 欧美 在线_王者男英雄的坤巴外网_乱伦日本亚洲自拍_大香蕉精品视频在线_欧洲性爱在线观看_一本色道久久88加勒比—综合_日韩精品重口另类一区_国产成人av观看

he physical properties of bromine compounds in different environments

Packaging plays a very important role in the safe transportation of bromine

Bromine has a strong volatility, so when stored in a container, it is easy to volatilize, and the vapor is corrosive, has a unique suffocation odor and tearing effect, so when bromine is used, it must be done Good preventive effect to prevent volatilization. ??After bromine volatilizes, it will cause great harm to human hands, eyes, nose and mouth, etc. Therefore, individuals who handle brom