for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts

Full Title

Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor > for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts

Classification Context

Section:

PERFORMING OPERATIONS; TRANSPORTING

Class:

MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR

Subclass:

TURNING; BORING