| 摘要 |
<p>The socket includes a protective device (35), including the moving shutters (37), which is fixed to the mechanism (11) by a support interposed in the space in the observation window (38,39). Each window is at least sufficiently narrow locally to oppose the passage of a test finger by the normal arrangement of the insulating material of the body (12). The window is at least partially covered by a transparent disc belonging to a small transparent plate which is common to the assembly and also is fixed to and overhangs from the device. The measurement of at least one of the windows in the direction of engagement is greater than half the mean diameter of the holes at rest.</p> |
