joint welding

例句：

1. 1. The construction crew is using a special joint welding machine to reinforce the beams.
   建筑工人正在使用一种特殊的焊接机器加固梁。
2. 2. Joint welding is an important process in the manufacturing of metal parts.
   焊接是金属部件制造过程中的一个重要过程。
3. 3. The engineers were discussing the latest developments in joint welding technology.
   工程师们正在讨论最新的焊接技术发展。