cross piece

例句：

1. 1. The carpenter used a cross piece to join the boards together.
   木匠用一个横杆将木板连接起来。
2. 2.The builders were using a cross piece to support the roof.
   建筑工人正在使用一个横杆来支撑屋顶。
3. 3. The engineer measured the length of the cross piece before cutting it.
   工程师在切割横杆之前测量了它的长度。