DIFF Subgroup
B23Q 39/042 Full Title
Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation (B23Q33/00, B23P23/00 take precedence) > the sub-assemblies being arranged to operate simultaneously at different stations, e.g. with an annular work-table moved in steps (associations of machines connected only by work-transferring means B23Q41/00)
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.