久久免费看少妇高潮a,国产婷婷综合丁香亚洲,日韩一区二区三区无码视频,亚洲精品美女在线观看播放

Average molecular weight is 7680-9510, polyoxyethylene (80%, w/w) and polyoxyepropylene block copolymer, The HLB value is 29; It can be used as emulsifier, solvent or suspension stabilizer in liquid oral preparation, local preparation and injection preparation, plasticizer and bioavailability promoter in solid preparation.