[Class : 11] Nuclear Reactors Namely Aerobic, Anaerobic, Anoxic & Other Bioreactor For Waste Water Treatment, Waste Water Treatment Apparatus, Waste Water Treatment Installations, Waste Water Treatment Tanks, Waste Water Purification Installations, Waste Water Treatment Tank For Industrial Purposes, Waste Water Treatment Tank For Household Purposes.

[Class : 1] Water Purifying Chemicals, Water Softening Preparations, Bacteriological Preparations, Other Than For Medical And Veterinary Use, Bacteriological Preparations For Acetification

[Class : 1] Water Purifying Chemicals, Water Softening Preparations, Bacteriological Preparations, Other Than For Medical And Veterinary Use, Bacteriological Preparations For Acetification