| 摘要 |
A bougie (10) is made up of an outer tube (18) surrounding an inner tube (16). Anti-rotation means in the form of equi-spaced ribs (20) on the inner tube (16) are received in corresponding longitudinal grooves (22) provided in the outer tube (18). The ribs (20) interlock in the grooves (22) to prevent relative rotation between the inner and outer tubes (16, 18) so that rotation can be applied from one end to the other with little or no backlash, whilst allowing slight longitudinal slippage when the bougie is bent into shape. |
