7
Dust control apparatus, equipment and instruments; infection control apparatus, equipment and instruments; dust control screens, tents, enclosures and work areas; infection control screens, tents, enclosures and work areas; dust containment screens, tents, enclosures and work areas; infection containment screens, tents, enclosures and work areas; portable dust containment screens, tents, enclosures and work areas; temporary erectable dust containment screens, tents, enclosures and work areas; portable infection containment screens, tents, enclosures and work areas; negative pressure tents, enclosures, chambers, and work areas; negative pressure environment generators; negative pressure generators; negative pressure fans; negative pressure pumps; air extraction systems; vacuum pumps; vacuum fans; vacuum systems; fans; dust extraction systems; filters; filter systems; air filtering systems; filters for separating particulate matter from air; filters for separating pathogens from air; air cleaning filters; and parts and fittings for all the aforesaid goods; all the aforesaid goods being or being part of dust containment installations for cleaning purposes
37
Machinery maintenance and repair; maintenance and repair of dust control apparatus, equipment and instruments; maintenance and repair of infection control apparatus, equipment and instruments; maintenance and repair of dust control screens, tents, enclosures and work areas; maintenance and repair of infection control screens, tents, enclosures and work areas; maintenance and repair of dust containment screens, tents, enclosures and work areas; maintenance and repair of infection containment screens, tents, enclosures and work areas; maintenance and repair of portable dust containment screens, tents, enclosures and work areas; maintenance and repair of temporary erectable dust containment screens, tents, enclosures and work areas; maintenance and repair of portable infection containment screens, tents, enclosures and work areas; maintenance and repair of negative pressure tents, enclosures, chambers and work areas; maintenance and repair of negative pressure environment generators; maintenance and repair of negative pressure generators, negative pressure fans, negative pressure pumps, air extraction systems, vacuum pumps, vacuum fans, vacuum systems, fans and dust extraction systems; maintenance and repair of filters, filter systems and air filtering systems; maintenance and repair of filters for separating particulate matter from air, filters for separating pathogens from air and air cleaning filters