| 摘要 |
<p>The screw (10) has screw head (14) and threaded portion (12) that are connected with each other. The screw head and screw are decoupled from one another by insulating element (16). The insulating element is securely connected to connection head, so that power transmission for activation of screw between screw head and threaded portion is enabled. The auxiliary stop units are provided at insulating element and are connected with screw head and threaded portion, when insulating element is damaged and move towards each other due to application of power transmission.</p> |
