metal jointing

例句：

1. 1.The metal jointing of the bridge is critical for its structural integrity.
   这座桥梁的金属焊接对它的结构性完整性至关重要。
2. 2. The engineers are working on a new design for the metal jointing system.
   工程师们正在研究一种新的金属焊接系统设计。
3. 3. The jointing process involves heating the metal together and then cooling it quickly to strengthen the bond.
   焊接过程涉及将金属加热在一起，然后迅速冷却以增强结合力。