羞羞视频大全_亚洲AV无码专区成人网址_午夜国产精品白虎_日韩专区无码专区_天堂在/线资源中文在线8_一级做a爰黑人有硬又粗_日韩久久伊人色综合_内射干少妇亚洲69xxx_黄网在线无码免费观看_另类欧美亚洲综合

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.