CPC Main Group
B23B 31/00 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)
7 direct subcodes
Child Classifications
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- B23B 31/02 Chucks
- B23B 31/40 Expansion mandrels