headless bolt for welding

例句：

1. 1.The engineer used a headless bolt for welding to reinforce the structure.
   工程师使用一个无头螺栓焊接件来加固结构。
2. 2. The construction crew had to use special tools to handle the headless bolt for welding.
   施工队伍不得不使用特殊的工具来处理无头螺栓焊接件。
3. 3.The engineer carefully measured and cut the headless bolt for welding before installing it.
   工程师仔细测量并切割无头螺栓焊接件，然后安装它。