cross tube

例句：

1. 1.The engineer used a cross tube to reinforce the beam.
   工程师使用一个十字管来加固梁。
2. 2.The construction workers were using cross tubes to support the roof.
   建筑工人正在使用十字管支撑屋顶。
3. 3. The bridge was designed with cross tubes to improve its stability.
   这座桥的设计包含了十字管，以增强其稳定性。