gravity feed welding

例句：

1. 1. The new machine uses gravity feedwelding to produce high-qualityparts.
   这台新机器使用重力焊接来生产高质量的部件。
2. 2. In the construction industry, gravity feed welding is widelyused for connecting steel beams.
   在建筑业中，重力焊接被广泛用于连接钢梁。
3. 3. The engineer explained that gravity feed welding was essential for ensuring the structuralintegrity of the bridge.
   这位工程师解释说，重力焊接对于确保桥梁的结构完整性至关重要。