国产亚洲成归v人片在线观看_精品91在线亚洲精品在线_成年午夜无码av片在线观看_亚洲欧美日本三级_精品人妻一区二区三区Av_91短视频app免费无限看_国产激情av女片自拍_亚洲曰本AV在线天堂_午夜欧洲影视网经典电影全集在线观看免费版高清_五月激情欧美中文丁香

Located in the beautiful Dongying city -a central city at the estuary of Yellow River, Shandong Chemical Co., Ltd is a newly established high-tech enterprise specializing in the research, development, production and trade of chemical products. Through establishing good cooperative relations with Tsinghua University, Petroleum University, Shandong University of Technology, Changchun Institute of Applied Chemistry (CIAC) and other well-known research institutes of China, we lay sound foundation for the sustainable development of Hongchuan in the future.  Our main products such as Triphenylphosphine oxide, triphenylphosphine, cyclohexylamine, dicyclohexylamine and butyrolactone, are highly appraised in the market for high quality and stable production. Relying on complete and well-established quality management system,  Hongchuan's integrity, strength and product quality are also highly recognized in the industry. Hongchuan sincerely welcomes your visit, guidance and business negotiation.