filling point

例句：

1. 1. The car's engine needs a filling point to be repaired.
   汽车的引擎需要填充点来修理。
2. 2. The engineer used a special tool to find the filling point in the pipe.
   工程师使用特殊的工具找到了管道中的填充点。
3. 3. The company is looking for a new filling point for its product line.
   该公司正在寻找新产品线的填充点。