DIFF Subgroup
B23B 47/287 Full Title
Constructional features of components specially designed for boring or drilling machines; Accessories therefor (working-spindles, bearing sleeves therefor B23Q1/70; for machine tools in general B23Q) > Drill jigs for workpieces (equipment for setting or guiding the drill B23B49/00)
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.