| 摘要 |
The lock of the manhole is devised to secure that there is no unwanted opening of the street manhole, with the goal to prevent terrorism and theft of the lid (17). It is constructed in a manner that ensures undisturbed passing of the vehicles, as well as resistance to water and dirt break through. As a security element it has a seal, visible from vehicles passing by.The lock is constructed from a body (3) with implemented rotor (5) that on its top has a triangle shaped element (12), and on the body (3) there are coaxially made groovs (13), in which sliders are set (7) with protrudes (8) that suppress with springs (11). |
