low-duty fire-clay brick

例句：

1. 1.The engineer designed the low-duty fire-clay bricks to withstand high temperatures.
   工程师设计了低负荷耐火砖，以承受高温。
2. 2. The construction crew used these low-duty fire-clay bricks for the foundation of the new hospital.
   建筑队使用这些低负荷耐火砖作为新医院地基的一部分。
3. 3. The builders were required to use only low-duty fire-clay bricks in their construction projects.
   建筑商在他们的建设项目中必须仅使用低负荷耐火砖。