精品无码自拍视频在线观看_视频一区网友自拍第二页_欧美zozo另类人禽交_中文字幕久久久久久精品

Custom made processing

With benzoic acid, phthalic anhydride and isophthalic acid as starting materials, the company synthesizes 3,5-Dinitrobenzoic acid, 3,5-Dinitrobenzoyl chloride, 3-Nitrophthalic acid, 3-Nitrophthalonitrile, 4-Nitrophthalic acid, 4-Nitrophthalonitrile , 5-Nitroisophthalic acid, 2-Methyl-6-nitroaniline and its derivatives, which are mainly used as medicine, pesticides, dyes, spices, new material intermediates.
71 Records 1234
Home

Home

News

News

About us

About us

Product

Product

Contact us

Contact us