午夜无码视频午夜无码视频_免费国产高清a在线视频_欧美-级高清免费一片_人与动人物a级毛

Jiujiang Changyu Chemicals Co., Ltd. started in 1983, specializing in the research and production of unit reactions such as nitrification, sulfonation, hydrogenation, separation, etc., and successively established Changzhou Changyu Chemical Co., Ltd. and Changzhou Changhong Chemical Technology Development Co., Ltd. , Changzhou Chungang Chemical Co., Ltd.
Production of food colorings, dyes, pesticides and pharmaceutical intermediates, the company has passed the high-tech, ISO 9001 and ISO 14000 certification. The factory covers an area of more than 200,000 square meters, with fixed assets of 250 million yuan. There are more than 250 employees, and various technical personnel account for about 20%. It is a comprehensive enterprise integrating R&D and production.