| 摘要 |
<p>The device is formed of two main parts, a first part (1) comprising a head (4) from one side of which extends a cylindrical rod (20) with an annular groove (3) adjacent its free end, and a second part (2) comprising a head (8) from one side of which extends a cylindrical spigot (7) provided with a blind axial bore to receive the rod (20). The head (8) of the second part (2) has a radial hole (10) therein, the hole (10) communicating with the bore and receiving a key-operated lock (11). A blocking member (17) of the lock can be actuated to engage in the groove (3) thereby securely locking the two parts (1,2) together. As the two parts are linearly coupled and can turn relative to one another, the closure device is safe against any attempt to force the parts (1,2) apart. <IMAGE></p> |
