久久久国产亚洲精品_久久精品综合一区二区三区_久久精品一品道久久精品9_男女一级做a爱过程免费视频

Main pharmaceutical intermediates, pharmaceutical excipients, reagents and surfactants

It is a fine chemical and modern pharmaceutical enterprise committed to the R & D, production, application and sales of green and environment-friendly new materials derived from ethylene oxide as the main raw material, and a member of the technological innovation strategic alliance of Liaoning new chemical materials industry.