婷婷久久综合九色综合绿巨人,日韩视频免费观看,少妇精品久久久一区二区三区,欧美日韩中文字幕在线播放,国产黄a三级三级看三级,日日麻批40分钟视频免费观看 ,日本一级在线观看

Disproportionated Rosin

PRODUCTS > Disproportionated Rosin > Disproportionated Rosin

Disproportionated Rosin

Uses: Disproportionated rosin is made from gum rosin through catalyzing by the Pd-C catalysts, mainly used in synthetic rubber, adhesives, pigments, dyestuff surfact treatment, coatings, inks, etc.