国产精品观看在线_高清欧美日韩一区二区三区在_AA精品视频在线在线观看免费_免费岛国A级毛片无码中出_日韩中文人妻无码二_亚洲福利精品黄色一区_亚洲成年网站在线隔壁老王_精品国产亚洲AV色欲三区_99久热只有精品视频免费看_欧美在线观看黄片

　　It can be used as a plasticizer, lubricant additive, and stabilizer, as well as an intermediate for pesticide insecticides such as "Futianong" and "Fenfencarb", and as a raw material for the pharmaceutical analgesic agent phenthiazide.