emptying fittings

例句：

1. 1. The engineer designed the new machine with special attention to its emptying fittings.
   工程师特别关注新机器的空腔配件设计。
2. 2. The factory uses a sophisticated emptying fittings system to ensure product quality.
   工厂使用先进的空腔配件系统来确保产品质量。
3. 3. The emptying fittings are designed to be easy to install and maintain, making the machine more user-friendly.
   空腔配件设计易于安装和维护，使机器更加用户友好。