37 Services for the construction, maintenance and demolition of industrial plants; services for the construction, maintenance and demolition of petrochemical plants; services for the construction, maintenance and demolition of water treating plants for human, agricultural and industrial use in civil, energy and oil sectors; services for the construction, maintenance and demolition of civil and industrial buildings; services for the construction, maintenance and demolition of domestic and industrial waste treatment and/or recycling plants; technical support services and supervision services in the construction, maintenance and demolition of industrial plants; technical support services and supervision services in the construction, maintenance and demolition of petrochemical plants; technical support services and supervision services in the construction, maintenance and demolition of water treating plants for human, agricultural and industrial use in civil, energy and oil sectors; technical support services and supervision services in the construction, maintenance and demolition of civil and industrial buildings; technical support services and supervision services in the construction, maintenance and demolition of domestic and industrial waste treatment and/or recycling plants.