C02F - Treatment of water, waste water, sewage, or sludge
2
G09B - Educational or demonstration appliances
1
A61J - Containers specially adapted for medical or pharmaceutical purposes
1
B65D - Containers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers
