| 摘要 |
The tool has a holding body (16) arranged to connect with an expansion or retraction mechanism (17) for maneuvering a bell-chuck (15), where the bell-chuck is arranged to rest on a periphery of a bezel (20) mounted on a middle part (22) of a watch (23). A thrust unit (30) is coaxially mounted at an inner side of the bell-chuck and arranged to rest on a crystal (21) driven into the middle part in order to exert a sufficient thrust force on the crystal to cause a relative displacement of the bell-chuck with respect to the crystal. |
