root gap of weld

例句：

1. 1. The root gap of theweld is critical for the strength ofthe joint.
   焊接根部间隙对于接头的强度至关重要。
2. 2. During the welding process, it's important to ensure thatthe root gap is evenly distributed.
   在焊接过程中，确保根部间隙均匀分布是很重要的。
3. 3. The engineer carefully measured and adjusted theroot gap to achieve optimal performance.
   工程师仔细测量并调整了根部间隙，以获得最佳性能。