DIFF Subgroup
B23B 31/003 Full Title
Chucks ; Expansion mandrels; Adaptations thereof for remote control (faceplates B23Q1/50; rotary devices holding by magnetic and/or electrical force acting directly on work B23Q3/152)
B23B 31/003 Chucks ; Expansion mandrels; Adaptations thereof for remote control (faceplates B23Q1/50; rotary devices holding by magnetic and/or electrical force acting directly on work B23Q3/152)