| 摘要 |
An attachment device (10) adapted for use with at least two retainers (14), the device (10) including at least two mountings (44), each for engagement with a retainer (14), wherein when a first one (14a) of the retainers is engaged with the device (10) it cannot be detached from the device until another retainer (14b) has been engaged with the device (10). |
