print barrel

例句：

1. 1. The printer needs to be serviced regularly to ensure optimal performance.
   打印机需要定期维护，以确保最佳性能。
2. 2.The printing process involves the use of different types of ink and paper.
   打印过程涉及使用不同类型的墨水和纸张。
3. 3. The printing press was a crucial tool for the early days of the printing industry.
   印刷机是早期印刷业的关键工具。