37 Construction, namely, engineered construction of buildings, offshore building constructions, tunnels, nuclear power plants, roads, power generators, industrial furnaces and chemical plants, and construction of transportation vessels in the nature of trains, boats, vessels, aircrafts, railway rolling stocks; repair of fire resistant sealing systems for engineered constructions, buildings, offshore-constructions, trains, boats, tunnels, nuclear power plants, roads, pavements, vessels, aircrafts, railway rolling stocks, power generators, industrial furnaces and chemical plants; installation of fire-resistant sealing systems for engineered constructions, buildings, offshore-constructions, trains, boats, tunnels, nuclear power plants, roads, pavements, vessels, aircrafts, railway rolling stocks, power generators, industrial furnaces and chemical plants