penetration fusion welding

例句：

1. 1. The penetration welding process is crucialfor the structural integrity of the steel beams.
   穿透焊接过程对于钢梁的结构完整性至关重要。
2. 2. The engineer used a special penetration welding technique to repair thedamaged area.
   工程师使用了一种特殊的穿透焊接技术来修复受损区域。
3. 3. In thiscase, the penetration welding was necessaryto ensure the structural stability of thebridge.
   在这种情况下，穿透焊接是必要的，以确保桥梁的结构稳定性。