Building construction services; building demolition; building construction supervision; scaffolding erection; installation, repair and maintenance of condensing apparatus, steam condensers, radiators for motors and engines, air reheaters, boiler tubes; asphalting; plumbing services; drilling of wells; mining extraction; quarry services, waste disposal for others, inspection services in the course of commercial building construction; rental of hand and power tools and construction equipment co...

Chemicals used in building industry, science, photography; unprocessed synthetic resins for use in the manufacture of plastic molding compounds; fire extinguishing compositions; chemical tempering and soldering preparations for use in metalworking; adhesives used in the building industry