About NOMURA HISASHI
About 千代田化工建設
About HASEGAWA JUN
About 千代田化工建設
About TAKAHASHI TSUTOMU
About 千代田化工建設
About WAKABAYASHI ATARU
About 千代田化工建設
About TOGAWARI OSAMU
About 千代田化工建設
About waste water treatment
About anodic oxidation
About Chemical treatment of sewage and wastewater
About Dyeing and finishing in general
About 染色
About 工業
About 排水
About 脱色