Blades without clips are held by screws and the clamp on the handle.
失去金属夹的刀片由螺丝和手柄上的夹子固定。
2
The lid simply screwson.
这盖子一拧就盖好了。
《牛津词典》
3
In doing so, it will help convince the rest of the international community to strengthen nonproliferation controls and tighten the screwson states that flout that their nonproliferation commitments.