welding roll

例句：

1. 1.The welding roll is used to hold the metal together during the welding process.
   焊接滚轮用于在焊接过程中将金属固定在一起。
2. 2. The welding roll is a critical component of the welding machine.
   焊接滚轮是焊接机的关键部件。
3. 3.The welding roll is made from high-carbon steel and has a smooth surface for easy handling.
   焊接滚轮由高碳钢制成，表面光滑便于操作。