dipped beam

例句：

1. 1.The engineer used a dipped beam to reinforce the structure.
   工程师使用浸入式梁加固了结构。
2. 2.The beam was dipped in oil before installation to prevent corrosion.
   安装前，这个梁被浸泡在油中以防止腐蚀。
3. 3. The beam's strength was tested by dipping it into a solution of salt water.
   通过将梁浸泡在盐水溶液中来测试其强度。