Cultivators for use in agriculture; Machines for use in agriculture; Mechanically powered apparatus for agriculture; Agricultural machines for ploughing; Ditchers (ploughs); Plough shares; Ploughs; Ploughs being agricultural machines; Machines for the treatment of seeds; Seed drills (machines); Seed drills (parts of machines); Seedling processing machines; Single seed sowing machines; Apparatus for use in drilling; Carbide drill bits for machines; Carbide drill tips for machines; Diamond drill bits for machines; Diamond tools for drilling for machines; Drill bits for machines; Drill machines; Drilling machines; Grain drills (machines); Ground drilling apparatus (machines); Implements (machines) for drilling; Machines for drilling; Self-driven machines for drilling