Apparatus for drilling bore holes; Apparatus for drilling wells; Apparatus for use in drilling; Apparatus for use in well drilling operations; Drilling heads (parts of machines); Tool bits for drilling (parts of machines); Fluid dispensing apparatus; Liquid dispensing machines for dispensing pre-measured amounts; Liquid dosage machines for dispensing pre-measured amounts; Machines for dispensing adhesives (industrial); Machines for dispensing liquids (other than vending)