热99在线播放亚洲天堂中文资源|一级黄aaa天天干用力干|国产区在线观看视频播放专区|久久精品无码日韩国产不卡

Application Area
AVIATION MANUFACTURING
Polysulfone is a kind of thermoplastic resin with sulfone group (- SO2 -) and arylene group in the main chain of molecule. Its English name is polysulfone (PSF or PSU for short). There are three kinds of common bisphenol a PSF (polysulfone), polysulfone and polyethersulfone.....