1
Water treatment preparations; Water purifying chemicals; Agents (Chemical -) for use in water purification; Flocculants; Activated carbon
11
Water purifying apparatus and machines; Water purification installations; Industrial-water purifying apparatus; Water conditioning apparatus; Filters for water purifiers; Water purification, desalination and conditioning installations
16
Educational and instructional material; Printed matter
37
Maintenance and repair of Water purifying apparatus
40
Water treating; On-site water purification services
42
Technical design and planning of water purification installations and devices; Technological consultancy; Technological consultancy regarding water purification devices, Water purification installations, sewers and purification installations
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