| 摘要 |
<p>A handling device (2) is associable to an on-off valve (4) and comprises handling means (8, 14, 42) suitable for being gripped by an operator, a connection device (20) for supporting said handling means, spring back means (42, 44) for returning said valve from the open configuration to the closed configuration (or vice versa) and a positioning and support device (54) through which the handling means support the spring back means in a position suitable for operating properly.</p> |
