平头钉

例句：

1. 1. The carpenter used a square to mark the corners of the wooden table.
   木匠用一个直角尺来标记木制桌子的角落。
2. 2. The construction workers were busy fixing the roof with the flathead screws.
   建筑工人正在用平头螺丝固定屋顶。
3. 3. The painter needed to secure the canvas to the wall with the flathead bolts.
   画家需要用平头螺栓将画布固定在墙上。