pretensioned bar

例句：

1. 1. The engineer used a pretensioned bar to hold the structure together during construction.
   工程师使用一个预张紧的杆来在建造期间保持结构的稳定性。
2. 2.The pretensioned bar was used to support the weight of the heavy equipment.
   预张紧的杆被用来支撑重型设备的重压。
3. 3. The pretensioned bar was installed in the ceiling to prevent water leakage during rainy seasons.
   预张紧的杆被安装在天花板上，以防止雨季漏水。