bolt supporting

例句：

1. 1.The car was bolted to the ground with a heavy metal bolt.
   这辆车用一个沉重的金属螺栓固定在地上。
2. 2.The roof of the house is bolted together with steel plates.
   房子的屋顶是用钢板连接起来的。
3. 3.The construction workers were bolting the beams into place.
   建筑工人正在将梁件安装到位。