quenching head

例句：

1. 1.The engineer used a cooling nozzle to cool down the metal before it was welded.
   工程师使用冷却喷嘴来冷却金属，使其在焊接前达到适宜的温度。
2. 2. During the manufacturing process, the quenching nozzle is used to quickly cool the workpiece.
   在制造过程中，冷却喷嘴被用来快速冷却工件。
3. 3.The quenching nozzle is crucial for preventing cracks in the welded joint.
   冷却喷嘴对于防止焊缝中出现裂纹至关重要。