Installation, cleaning, repair and maintenance services relating to vehicles and conveyances, namely land vehicles for the transport of heavy loads, land vehicles for the transport of bulky loads, land vehicles for the transport of heavy and bulky loads; self-propelled land vehicles for the transport of heavy loads, self-propelled land vehicles for the transport of bulky loads, self-propelled land vehicles for the transport of heavy and bulky loads; part and components of the aforesaid vehicl...