11
Onsite or portable water and wastewater treatment, purification and filtration apparatus and installations designed to process drinking or process water or to remove pollutants before dispersion in the environment, used in residential, commercial, community, municipal, institutional or industrial applications
33
Retail store services featuring water and wastewater treatment, purification and filtration apparatus and installations
37
Installation and maintenance of water and wastewater treatment, purification and filtration apparatus and installations
40
Operation of water and wastewater treatment, purification and filtration apparatus and installations; environmental and technical consultation in the field of water and wastewater treatment
42
Site evaluation, design and engineering of water and wastewater treatment installations; supervision services in the field of water and wastewater treatment; technical and scientific consultation in the field of wastewater treatment and management
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