7 Agricultural machines, namely, cultivators, ploughs, spading machines, harrows, surface scraper-levellers, subsoilers, landrollers and seedbed preparing combinations, earthmoving or excavating machines, fertilizer distributors, manure spreaders, seed drills or sowing machines for agriculture and horticulture, mowers, and hay-making machines; milking machines and milk extracting systems, namely, industrial robots used in connection with milking machines and milk extracting systems and components thereof, namely, vacuum and pulsation machines, connectors, and machines predominantly for use in cleaning the equipment and components of the milk extraction systems which also cools and stores the equipment and components