B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23B—TURNING; BORING
B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
B23B39/14—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines with special provision to enable the machine or the drilling or boring head to be moved into any desired position, e.g. with respect to immovable work