久草丝袜在线|五月天中文字幕|国产成人av一区二区三区|少妇福利在线,成人午夜精品久久久久久久网站,日本大尺度电影未删减,国产视频一区二区三

Sulphur Black Sulphur parti-color Medicine intermediates Vat pink R Dye intermediates Others

Shanxi Linfen Dyeing Chemicals (Group) Co., Ltd. was founded in 1960 and became a limited liability company in 1997. At present, Shanxi Linfen Dyeing Chemicals (Group) Co., Ltd. is the executive director unit of China Dyestuff Association, one of top-500 chemical enterprises of China and one of top-20 dyeing chemical enterprises of China. We got the certificate of ISO9001 quality system in 1999. There are province-level enterprise technological center and 36 sets of leading...